Visual Status Research Articles

Child Neurology: Five-Year Update on Siblings With Riboflavin Transporter Deficiency: Stable Visual and Neurologic Status With Continued Riboflavin Therapy.

Riboflavin transporter deficiency (RTD), previously referred to as Brown-Vialetto-Van Laere syndrome, is caused by pathogenic variants in the SLC52A1, SLC52A2, or SLC52A3 genes, resulting in RTD types 1, 2, and 3, respectively. Researchers estimate an occurrence of approximately 1 in 1,000,000. There is only one case of type 1 described in medical literature. Type 2 is characterized by muscle weakness in the arms and neck, vision loss, hearing impairment, and sensory ataxia. In type 3, vocal cord paralysis is more common and muscle weakness is more generalized. In 2018, we described a case of a 6-year-old girl with RTD type 2 who made remarkable visual recovery after initiation of treatment with oral riboflavin and coenzyme Q10 supplementation. The patient's younger brother began the same treatment regimen after genetic testing confirmed that he carried the same genetic variant. In this report, we update the visual and neurologic status in these siblings 5 years after our initial report and 7.5 years after initiation of riboflavin treatment.

An assessment of Discectomy Surgery on Prolapsed Lumbar Intervertebral Disc

Background: Basically, human backbone or spinal column is of a chain of bones also known as vertebrae. Spinal cord runs through the spinal column. Lumbar discectomy is a type of surgery to fix a disc in the lower back portion of human body. This surgery uses smaller cuts (incisions) than an open lumbar discectomy. We have very few proved data regarding the effectiveness of discectomy surgery on prolapsed lumbar intervertebral disc.Aim of the study: The aim of this study was to assess the role of discectomy surgery on prolapsed lumbar intervertebral disc.Methods: This was a prospective observational study which was conducted at the Department of Orthopedics Surgery in Bangabandhu Sheikh Mujib Medical University (BSMMU), Dhaka, Bangladesh during the period from January 2017 to December 2017. In total 38 patients with low back pain selected for discectomy surgery on prolapsed lumbar intervertebral disc were enrolled as the study population. This study was approved by the ethical committee of the mentioned hospital. Proper written consents were taken from all the participants before starting data collection. A pre-designed questionnaire was used in patent data collection. Radicular pain was observed by visual analogue score and disability status was done by using Oswestry disability index. By using modified Macnab criteria, outcome of the surgery was determined. All data were processed, analyzed and disseminated by MS Office and SPSS version as per need.Result: In our study as postoperative complication dural tear, superficial wound infection and foot drop were observed in 57.14% (Highest), 28.57% and 14.29% (Lowest) participants respectively. In analyzing radicular pain among the participants, we observed that VAS score had been reduced to 1.6±1.2 from 7.2±5.4 within one year of surgery which was 2.7±1.3 at immediate postoperative period. On the other hand, in analyzing Disability status among the participants we observed that, ODI index had been reduced to 10±1 from 64±8 within one year of surgery which was 17±6 at immediate postoperative period. According to the Modified Macnab Criteria in analyzing the final outcome among the participants we observed 52.63%, 39.47%, 5.26% and 2.63% participants got ‘Excellent’ (Highest), ‘Good’, ‘Fair’ and ‘Poor’ (Lowest) results respectively.Conclusion: In terms of reduction of pain, complication and disability scores it was noted that, in the surgery of prolapsed lumbar intervertebral disc the surgical outcome after one year period of discectomy is quite satisfactory. Considering the cost effectiveness and short treatment duration this surgical method may consider as the choice of method for treating patients with prolapsed lumbar intervertebral disc.

Impact of visual impairments on cognitive functions in older adults: insights from NHANES data.

Visual impairments (VI) are common in the older adults and may affect cognitive functions through mechanisms such as reduced sensory input and increased social isolation. Although current understanding of this association is incomplete, evidence suggests a potential link between poor vision and cognitive decline. This study aims to investigate the relationship between Subjective Visual Impairment (SVI), Objective Visual Impairment (OVI), and cognitive decline in the older adults, and assess whether these associations remain significant after controlling for multiple confounding factors. Data from the National Health and Nutrition Examination Survey (NHANES) for the years 1999-2002 were utilized, focusing on participants aged 60 and above. A total of 2,522 eligible participants were analyzed to assess their cognitive function and visual status. Weighted logistic regression models were used to explore the relationship between cognitive status and VI, progressively adjusting for confounding variables. Non-linear associations between cognitive score and VI were further explored using restricted cubic spline analysis. Visual impairments were significantly associated with worse cognitive function. Participants with SVI had a 3.437-fold higher risk of cognitive decline compared to those without SVI (95% CI: 2.648-4.461, p < 0.001). After adjusting for multiple covariates, the association remained significant (adjusted OR for SVI: 1.921, 95% CI: 1.346-2.742, p = 0.001; adjusted OR for OVI: 3.075, 95% CI: 1.740-5.433, p = 0.001). The restricted cubic spline analysis revealed a non-linear relationship between cognitive score and visual impairment, suggesting that the impact of visual impairment on cognitive decline varies across different levels of cognitive function. This study highlights a significant association between visual impairment and cognitive decline, even after controlling for multiple potential influencers. The findings support the integration of vision assessments into older adults care to identify and address vision problems early, potentially mitigating cognitive decline. The discovery of non-linear relationships further suggests that vision interventions may be particularly vital at certain stages of cognitive scores.

Parental awareness on myopia prevention and control among 350 children.

To understand the current situation of parental perspectives, knowledge, and practices concerning myopia prevention and control for both pre- and school-aged children. This study was a cross-sectional survey that involved children aged 0 to 15y and their parents. Participants were required to respond to an online questionnaire by scanning a quick response (QR) code. The questionnaire consisted of 25 tick-box questions and was open to response from December 22, 2022, to January 5, 2023. The dioptric traits of the children, the visual status and educational background of the parents, the parental perspectives towards myopia and its risks, and the parents' knowledge and practices related to myopia prevention and control were recorded and measured. The Chi-square test and binomial logistic regression were used for statistics. Totally 350 parents responded to the questionnaire. The prevalence and severity of myopia among the surveyed children exhibited a positive correlation with advancing age (P<0.001 and P=0.004, respectively). Nearly half of parents with myopic children considered myopia did not pose any health threat and could be effectively corrected (P<0.001). Parents who held master's or doctoral degree demonstrated a better understanding of children's vision standards for each age group (P=0.001), and 31.63% of them could undergo initial vision screening for their children during the age of 0 to 3y while parents with bachelor's degree (34.04%) and below (32.43%) mainly initiated the vision examination for their children at the age of 4 to 6y (P=0.05). Parents with master's or doctoral degree also exhibited more rational practices concerning outdoor time (P=0.048) and sleep time (P=0.044). No other significant discrepancy among the different educational groups in additional conceptions of myopia, such as hyperopia reserve, axis length, and corneal curvature alterations. Most parents preferred to employ conventional interventions, such as enhancing indoor lighting condition (80.00%) and ensuring appropriate reading posture and distance (71.71%). The current status of parental knowledge and practices about myopia prevention and control remains outdated and deficient. The administrative department should implement efficacious and adaptable measures to enhance parental awareness and foster their commitment towards myopia prevention and control.

The role of intervention timing and treatment modality in visual recovery following pituitary apoplexy: a systematic review and meta-analysis.

Pituitary apoplexy has historically been considered an emergent condition that necessitates surgical intervention when there is acute symptomatic onset. This potentially serious condition often occurs in the setting of an underlying adenoma, cystic lesion, or other sellar mass. When these mass lesions hemorrhage within the confined space of the sella turcica, the pituitary gland is subjected to hemorrhagic ischemia. Furthermore, critical neurovasculature in close proximity to the sella can sustain collateral damage. In the present study, we investigate whether early versus delayed surgical intervention (in terms of three timelines: before versus after 48h, 72h, and 7days, respectively) results in differences in visual outcomes for patients experiencing pituitary apoplexy with acute onset neurological and/or neuro-opthalmic symptoms. Furthermore, we compare the efficacy of surgical decompression versus expectant management of this condition. Accordingly, we queried the PubMed, Scopus, and Embase databases in adherence to PRISMA guidelines. Quantitative meta-analysis was performed according to the Mantel-Haenszel method and forest plots were generated using Review Manager v5.4. P-values < 0.05 were defined as the threshold for statistical significance. Twenty-nine studies remained eligible for review following initial search and screen, including 16 studies describing the role of intervention timing and 15 studies comparing intervention modality. Most patients presented with a visual deficit, and all patients underwent surgery - most commonly via the endoscopic endonasal (EEA) approach. Two hundred and twenty patients were included in the sub-analysis for the 7-day cutoff point. Furthermore, 81 patients underwent surgical decompression of the sella prior to 48h, and 32 patients underwent surgical decompression between 48-72h following presentation. Almost all patients exhibited improved vision post-decompression, including 19/19 patients (100%) in the post-72-h cohort. On meta-analysis using the Mantel-Haenszel method, there was a significant difference in vision outcomes in favor of patients who underwent surgical decompression before 7days as compared to after seven days (OR 5.88, 95% CI [1.77, 19.60], I2 = 0%, p < 0.01). In a separate sub-analysis, there was a total of 288 patients across 15 studies comparing surgical versus conservative management of pituitary apoplexy. These management options proved equivocal on meta-analysis (p > 0.05). In the present study, timing of surgical intervention for pituitary apoplexy was predictive of visual function recovery only at the 7-day timepoint, as has been reported by previous studies. Ultimately, this suggests that pituitary apoplexy involving severe visual deficits or altered mental status is best addressed within the first seven days post-presentation, and that both surgery and conservative management can offer similar outcomes. When apoplexy is suspected, IV corticosteroids should be administered independent of acuity or severity to prevent secondary adrenal crisis. Subsequently, for patients presenting without severe visual or other neurological deficits, expectant management is recommended. Management should be patient-specific and dependent upon the severity of symptoms present at onset.

Parental Ability to Detect Visual or Ocular Anomalies in Their Children

INTRODUCTION: Children typically depend on their parents to seek eyecare. Visual and ocular disorders can be challenging for parents to identify with the absence of apparent symptoms. This may hinder timely clinical diagnosis for children who need treatment. Parental awareness regarding common paediatric eye and vision anomalies along with eye care seeking behaviour has been reported, but there is a lack of studies that demonstrate parental ability to identify a presenting eye or vision disorder in their own children. AIM: This study aimed to determine parental ability to recognise a significant eye problem in their children. METHODS: The study population consisted of beneficiaries of Jaber Al Ahmad Armed Forces Hospital in Kuwait. Structured history and symptoms were taken from parents and comprehensive eye examinations were conducted for their children. Parental responses were compared to the eye test results to attain the study purpose. RESULTS: A total of 188 parental interviews and 188 eye test results data were collected from 137 parents and their children. Only a few parents (18.1%) were able to detect significant visual or ocular anomalies in their children. One-third of the parents (33%) were under the assumption that the visual or ocular status of their children was within the norm, while the eye test results showed that the children had clinically significant issues. Overall, 41.5% of the entire group of parents were wrong in their assumption about the children&amp;rsquo;s visual or ocular status. CONCLUSION: The findings suggest that a large proportion of parents may not be able to identify a presenting eye disorder in their children. This emphasises the significance of routine eye examinations at an early age.

Early Visual Outcome of Surgically Treated Anterior and Middle Skull Base Meningiomas: A Prospective Multicenter Observational Study

Background: Meningiomas are the most common primary intracranial tumors. Visual deterioration is the first symptom for most patients with anterior and middle fossa meningiomas. The main aim of surgery is the total removal of the tumor, resulting in improvement or preservation of preoperative visual status. Objective: To assess a 30-day visual outcome after surgical treatment of anterior and middle skull base Meningiomas. Methods: Institution-based prospective cross-sectional study was conducted among hospitalized and operated patients from September 1, 2020, to August 31, 2020. Early postoperative visual outcome and associated factors affecting visual outcome were determined using the WHO visual criteria. Bivariate and multivariate correlation analysis was performed to identify associated variables. The p-value of &lt;0.05 was considered significant. Results: Among the 43 patients enrolled, the majority 40(93%) were females and 27(62.8%) of the patients were under the age of 45. The commonest presenting symptoms were headache and visual impairment in 41(95.3%) and 33(78.7%) of patients respectively. Postoperative visual improvement was found in 21(48.8%) of patients whereas 18(41.9%) of patients had a similar course and 4(9%) of the patients deteriorated. Age, duration of visual deterioration, peri-operative visual status, tumor size, optic canal extension, and Simpson grading of resection were found to have a significant association with visual outcome. Conclusion: Postoperative visual improvement was found in 21(48.8%) of patients, which is comparable with most studies. The postoperative visual outcome is favorably affected by a shorter duration of visual deterioration before surgery, better preoperative visual status, and tumor size less than 4cm.

Orthokeratology for high myopia

Purpose. With an increasing proportion of children with myopia especially in Asia, efforts have been made to reduce chances of preventable sight loss related to high myopia in the future. Orthokeratology lens has been used as one of the modalities not just to correct myopia, but also to slow down myopic progression and axial elongation. This case report reviews a patient with clinically significantly high myopia, whose refractive errors was partially corrected with orthokeratology lens and spectacle lenses. Material and Methods. A now 14-year-old patient with a history of fast progressing myopia, was prescribed and commended orthokeratology to manage myopia, while regularly monitoring her refractive errors, axial length, binocular vision status, corneal topography, and anterior eye health was monitored regularly at the author’s practice. Results. Over a two year follow up period, a partial correction of high myopia with orthokeratology lenses and residual refractive errors with additional spectacle lenses was effective in managing this patient’s myopia, as well as slowing of axial elongation. An updated pair of orthokeratology lens with a steeper back optic zone radii were prescribed to reduce superficial corneal staining and to maintain corneal health. Conclusion. Patient commitment and adherence to close monitoring of eyes in terms refractive errors, axial length, and anterior eye health, are vital in achieving a successful orthokeratology lens wear for high myopia. A dual fitting strategy consisting of orthokeratology lens and spectacle wear can be a safe management strategy that is acceptable for patients with high myopia. It would be helpful for practitioners to be able to rely on robust evidence-based guidance when determining whether lens wear can be ceased, i.e. when further axial elongation and myopic progression are no longer likely.

The Effects of Excessive Use of Computer Screen on Visual Acuity among Non-academic University Staff

Background: The increasing prevalence of computer vision syndrome (CVS) necessitates a thorough understanding of its impact on visual health among users. This study aimed to investigate the adverse effects of long-term computer usage on the visual acuity of non-academic staff at the University of Port Harcourt, Nigeria. Methods: This cross-sectional study involved 321 non-academic staff members aged 18-45 years with at least two years of computer usage experience. The participants were randomly selected and completed a structured questionnaire assessing demographic details, computer usage habits, and visual health status. Visual acuity was measured using the Snellen eye chart, and the data were analysed using SPSS version 25, applying descriptive statistics and chi-square tests for significance. Results: Among the 159 computer users, 32.7% reported using screens for more than six hours daily. Common symptoms included eye strain (17.6%), blurred vision (14.7%), and headaches (13.2%). Visual acuity assessments indicated that 66.9% of computer users had normal vision in the left eye, whereas 82.6% of computer users exhibited abnormal visual acuity compared with non-users (χ2 = 29.89, p = 0.00). A significant association was found between increased screen time and reduced normal visual acuity, with 27.3% of users with over five years of screen time reporting normal vision. Conclusion: This study highlighted the adverse effects of prolonged computer usage on visual acuity among non-academic staff, emphasizing the need for awareness and preventive measures to mitigate the risk of CVS in this population.

Testing Visual Function by Assessment of the Optomotor Reflex in Glaucoma.

Optomotor response/reflex (OMR) is a fast and efficient first-in-line visual screening method, especially for rodents. It has the potential to evaluate both the scotopic and photopic visions of nonrestrained animals through tracking head movement, providing a quantitative estimate of visual functions. In restrained animals, optokinetic response (OKR), compensatory eye movements for visual shifts in the surroundings, is utilized. Both OMR and OKR capitalize on an individual's innate reflex to stabilize images for the purpose of capturing clear vision. The two reflexes have similar reliability when evaluating stimulus luminance, contrast, spatial frequency, and velocity. They have emerged as powerful tools to evaluate the efficacy of pharmacological treatments and phenotypes of subjects undergoing study. With OMR and OKR accurately assessing visual acuity (VA) as well as contrast sensitivity (CS), the gold standards for measuring clinical vision, they provide reliable and easily accessible results that further eye and brain research. These methods of sight evaluation have been used in multiple animal models, particularly mice and zebrafish. Through OMR assays, these animal models have been utilized to investigate retinal degenerative diseases, helping researchers differentiate between worsening stages. Alongside tests such as optical coherence tomography (OCT), OMR provides confirmation of visual status, where increased OMR function often correlates with improved visual status. OMR has continued to be used outside of glaucoma in various retinal diseases, such as retinitis pigmentosa (RP), diabetic retinopathy, and age-related macular degeneration.In this chapter, we will introduce the concept and application of visual stimulus-induced head or eye reflex movement in different animal species and experimental models of eye diseases, such as glaucoma and other neurodegenerative disorders, and in patients with glaucoma.

Visual Status in Children with Dyslexia at the Integrated Special Education Program in Selangor, Malaysia

Objective: Dyslexia is a learning disorder, characterized by difficulties in recognizing, decoding, and spelling words. Studies on visual status of individuals with dyslexia have yielded mixed findings. This study aimed to assess visual acuity and refractive errors in dyslexic children in Selangor, Malaysia.Material and Methods: A cross-sectional study was conducted in the integrated special education program (PPKI) for secondary schools across three randomly selected districts in Selangor. Children with dyslexia from 15 schools were enrolled. Distance and near visual acuity were measured, and non-cycloplegic refraction was performed to identify refractive errors. Descriptive analysis was used to describe the distribution of visual acuity and refractive errors. The Wilcoxon Signed-Rank test was used to compare habitual and corrected visual acuity (VA).Results: 137 dyslexic children, aged 13 to 19 years, participated in the study. 60% of the participants had good habitual distance VA. Meanwhile, the percentage of good habitual near VA were higher than distance VA. The Wilcoxon Signed-Rank test showed that corrected VA was significantly better than habitual VA. The most common ametropias observed were myopia and astigmatism.Conclusion: Dyslexic children in the PPKI program generally have good visual acuity and are emmetropic. However, uncorrected refractive error and suboptimal optical refraction were the primary causes of unsatisfactory habitual vision in some children. Findings highlight the need to screen for refractive errors and provide appropriate optical correction to this population to prevent further hindrance to their reading ability.

The relationship between visual health and influencing factors among primary and secondary school students: a survey based in the Ningxia Hui Autonomous Region of China.

The myopia rate of young people around the world, especially in China, has continued to rise, and the vision health of primary and secondary school students has gradually become a global concern. It was to explore the current characteristics of vision status and their intrinsic links to influencing factors of the Ningxia Hui Autonomous Region primary and secondary school students under regional characteristics. 1,670 primary and secondary school students in Ningxia Hui Autonomous Region were surveyed using Vision examination, International Physical Activity Scale, Lifestyle Behavior Scale. The data were analyzed using SPSS 25.0 and AMOS 23.0. The prevalence of myopia among primary and secondary school students in the Ningxia Hui Autonomous Region was 27.3%, with rates of 31.5% for girls and 23.4% for boys. There was a significant negative correlation between lifestyle behaviors (r = -0.36, p < 0.01) and physical activity level (r = -0.06, p < 0.05) with vision status. The physical activity level played a significant masking effect between lifestyle behaviors and vision status (a*b = 0.002, c' = -0.044). Gender moderated the effects of lifestyle behaviors on physical activity level and vision status, as well as the effects of physical activity level on vision status. These factors constituted a mixed model with mediating and moderation. The model fitted well (RMSEA = 0.028, CFI = 0.951, NFI = 0.918). The prevalence of myopia among primary and secondary school students in this region is lower than the national average in China, and it is associated with lifestyle behaviors, physical activity level, and gender. When effectively controlled, the physical activity level significantly will reduce the prevalence of myopia as a masking variable. Gender, as a moderating variable, provides theoretical support for the classification and prevention of myopia. Regional surveys enriched the global database on adolescent myopia research, revealing the characteristics and common factors of visual problems in adolescents. Relevant departments and schools should integrate eye care into the national health security system, implement policies related to myopia prevention and control and safeguard the visual health of primary and secondary school students.

Assessment of Refractive Errors, Dental Caries, and Scoliosis in School Children Aged 6-14 Years: A Study in Durrës Schools

This study aims to assess the prevalence of refractive errors, dental caries, and scoliosis in children aged 6-14 years across several primary and secondary schools in the city of Durrës. The sample includes 370 students from "Vincenc Prendushi", "Nënë Tereza", "Vasil Ziu", "Abedin Dino", and "Bajram Curri" schools. Each school was selected randomly. From each school we have selected different classes and students for further evaluation. Each student underwent a clinical examination to evaluate vision, oral health, and postural status. Refractive errors were assessed using Snellen chart table placed in 6 meters. Dental caries was evaluated through clinical inspection of the teeth, using the DMFT index (Decayed, Missing, and Filled Teeth). Scoliosis was diagnosed through physical examination and the Adams forward bend test, done in physiotherapy lab of Aleksander Moisiu University. The results provide insight into the risk factors and the need for early interventions to improve the overall health of children in this age group. Out of the 370 students, 28% (104 students) were found to have refractive errors, with myopia being the most common condition, affecting 17% (63 students), followed by hyperopia in 9% (33 students), and astigmatism in 2% (8 students). A total of 42% (155 students) exhibited signs of dental caries, with an average DMFT score of 2.8, indicating a moderate level of oral health concerns. Additionally, 12% (45 students) were diagnosed with scoliosis, with mild curvature observed in 8% (30 students) and moderate to severe curvature in 4% (15 students). These findings suggest a significant need for vision correction, oral health education, and orthopedic monitoring in the student population. Early detection and preventive measures in schools are crucial to addressing these health issues effectively and ensuring the well-being of children during their developmental years.

Application of machine vision in food computing: A review

With global intelligence advancing and the awareness of sustainable development growing, artificial intelligence technology is increasingly being applied to the food industry. This paper, grounded in practical application cases, reviews the current research status and prospects of machine vision–based image recognition technology in food computing. It explores the general workflow of image recognition, applications based on traditional machine learning and deep learning methods. The paper covers areas including food safety detection, dietary nutrition analysis, process monitoring, and enterprise management model optimization. The aim is to provide a solid theoretical foundation and technical guidance for the integration and cross-fertilization of the food industry with artificial intelligence technology.

Importance of Grading Cataracts in Predicting Recovery Time and Final Visual Outcomes After Cataract Surgery.

Cataracts have been considered as one of the major causes for reducing the vision-related quality of life and increasing the risk of comorbidities and mortality among the general population. This study aimed to assess the importance of grading cataracts in predicting recovery time and final visual outcomes after cataract surgery. A retrospective consecutive case review of elective cataract surgeries performed in a tertiary care hospital during a three-year period from 2019 to 2021 was studied. The postoperative visual status was correlated with grading. The reports of this study implicate the fact that 16.4% of the patients had grade 1 anterior segment cataracts. Visual acuity of perfect vision (6/6P) was obtained in 24% of patients, and 41.2% of patients had grade 1 anterior segment cataract surgery on day 1 (p<0.005). Perfect vision at 6/6 visual acuity was obtained in 24% of patients, and 27.5% of patients had grade 2 anterior segment cataract surgery in week 1 (p<0.05). The study shows that patients with grade 1 anterior segment cataract surgery had a better visual recovery time and visual outcome. The grading system of cataracts has further shown improvement in the vision care of the patients, along with showing reliability and monitoring of cataract formation.

A Case Study on The Evaluation of Maturity Class in Potato Breeding Trials Using UAV Imagery

In potato breeding, maturity class (MC) is a crucial selection criterion because this is a critical aspect of commercial potato production. Currently, the classification of potato genotypes into MCs is done visually, which is time- and labor-consuming. The objective of this research was to use vegetation indices (VIs) derived from unmanned aerial vehicle (UAV) imagery to remotely assign MCs to potato plants grown in trials, representing three different early stages within a multi-year breeding program. The relationships between VIs (GOSAVI – Green Optimized Soil Adjusted Vegetation Index, MCARI2 – Modified Chlorophyll Absorption Index-Improved, NDRE – Normalized Difference Red Edge, NDVI – Normalized Difference Vegetation Index, and OSAVI – Optimized Soil Adjusted Vegetation Index and WDVI – Weighted Difference Vegetation Index) and visual potato canopy status were determined. Further, this study aimed to identify factors that could improve the accuracy (decrease Mean Absolute Error – MAE) of potato MC estimation remotely. Results show that VIs derived from UAV imagery can be effectively used to remotely assign MCs to potato breeding lines, with higher accuracy for the potato B-clones (20 plants per plot) than the A-clones (6 plants per plot). Among the tested VIs, the NDRE allowed for potato MC evaluation with the lowest MAE. Applying NDRE for remote MC estimation using a validation dataset of potato B-clones (100 plants per plot), resulted in an MC estimate with a 0.81 MAE. However, the accuracy of potato MC estimation using UAV image-based methods should be improved by reducing the potato canopy’s variability (increasing uniformity) within the plot. This could be achieved by minimizing 1) potato vines bending over the neighboring row, causing vine overlap between plots, and 2) plants damaged by tractor wheels during field operations.

Unsupervised fault detection in automated sequential manufacturing processes through image analysis and convolutional LSTM-based next visual status prediction

Unsupervised fault detection in automated sequential manufacturing processes through image analysis and convolutional LSTM-based next visual status prediction

Differences in need for and access to eye health services between older people with and without disability: A cross-sectional survey in four districts of northern Uganda.

Eye health and disability are both common among older people, and it is important to understand how disability relates to visual health status and access to services. While people with disabilities face barriers to accessing health services, few studies have measured participants' functional status in domains other than vision and little evidence exists on how disability impacts eye health services access. This paper describes how visual impairment and access to eye health services differ between people aged 50 years and above with and without disability in Karamoja, Uganda, and explores the factors driving that difference. This was a cross-sectional survey among individuals aged 50 years and above. A standardised eye health survey was conducted, with additional questions on personal and health characteristics. Ophthalmologists conducted a vision examination, and recorded participants' self-reported functional difficulties using the Washington Group Short Set Enhanced. Descriptive analyses were conducted using Stata, and multivariate models constructed to explore relationships. 21.7% of respondents self-reported some sort of functional difficulty. Twenty-five percent of individuals with a non-visual functional difficulty are also blind, and a further 29% experience a lower level of VI. In a multivariate model, blindness was associated with self-reported difficulties seeing, but not any other type of difficulty. Blindness was also associated with age, not being married, and living in a smaller household. Access to cataract surgery was associated with non-visual functional difficulties, male gender, and having a regular household income. This study confirms that in the study area, disability and visual impairment are common among people aged 50 years and above, access to eye health services is low, and self-reported functional difficulties are not associated with lower access to services.

Effects of retinopathy on visual function in type 2 diabetes mellitus

Objective: To study the influence of the severity of diabetic retinopathy (DR) on the visual function of patients with type 2 diabetes, to provide scientific basis for the early prevention and control of DR. Methods: This study was designed as a cross-sectional study, recruiting already-diagnosed type 2 diabetes patients in four community health service centers in Guizhou Province between February and September 2022. Employing the Chinese version of the Visual Function Index-14 (VF-14), assess the participants' near vision, visual adaptation, subjective visual perception, and stereo vision, with higher scores indicating poorer visual function. Categorize the severity of each eye's damage into no diabetic retinopathy (DR), mild non-proliferative diabetic retinopathy (NPDR), moderate NPDR, severe NPDR, and proliferative diabetic retinopathy (PDR), and use a 5-level DR grading system to evaluate the overall severity of diabetic retinopathy in both eyes. Employing linear regression analysis to investigate the linear relationship between DR and visual function index. Local weighted regression evaluates the nonlinear relationship between the DR composite score and the scores of visual function, with a steeper slope indicating poorer visual function for that level. Results: A total of 542 patients with type 2 diabetes were investigated, including 244 (45.02%) males, 298 (54.98%) females, and 162 (29.89%) patients with DR. After adjusting for confounders, compared with those without DR, patients with binocular DR Had overall scores (β=0.136, P=0.003), near vision (β=0.163, P<0.001), visual adaptation (β=0.092, P=0.042), subjective vision (β=0.120, P=0.009) and stereo vision (β=0.094, P=0.044) were higher than those without DR. There were no differences in visual functions between DR And monocular DR. The local weighted regression curve showed that near vision (slope: 23.78) and overall score (slope: 58.37) increased sharply from mild to moderate NPDR in both eyes. Visual adaptation (slope: 5.37, 7.72), subjective vision (slope: 6.53, 7.93), stereovision (slope: 0.74, 0.91) increased slowly in mild to moderate NPDR in both eyes and in moderate to severe NPDR/PDR in both eyes. Conclusion: Binocular DR is associated with impaired visual function, but there is no difference between monocular DR And non-DR visual function. The early damage of DR To visual function is mainly manifested in near vision. In the prevention and control of DR, more attention should be paid to visual function, especially the change of near vision, and retinal damage should not be assessed solely by visual status.

Visual and Auditory Sensory Impairments Differentially Relate with Alzheimer's Pathology.

We intended to investigate the relationships between visual sensory impairment (VSI) or auditory sensory impairment (ASI) and brain pathological changes associated with cognitive decline in older adults. We primarily tried to examine whether each sensory impairment is related to Alzheimer's disease (AD) pathology, specifically beta-amyloid (Aβ) deposition, through both cross-sectional and longitudinal approaches in cognitively unimpaired older adults. Self-report questionnaires on vision and hearing status were administered at the baseline. Neuroimaging scans including brain [11C] Pittsburgh Compound B PET and MRI, as well as clinical assessments, were performed at baseline and 2-year follow-up. Cross-sectional analyses showed that the VSI-positive group had significantly higher Aβ deposition than the VSI-negative group, whereas there was no significant association between ASI positivity and Aβ deposition. Longitudinal analyses revealed that VSI positivity at baseline was significantly associated with increased Aβ deposition over 2 years (β = 0.153, p = 0.025), although ASI positivity was not (β = 0.045, p = 0.518). VSI positivity at baseline was also significantly associated with greater atrophic changes in AD-related brain regions over the 2-year follow-up period (β = -0.207, p = 0.005), whereas ASI positivity was not (β = 0.024, p = 0.753). Neither VSI nor ASI positivity was related to cerebrovascular injury, as measured based on the white matter hyperintensity volume. The findings suggest that VSI is probably related to AD-specific pathological changes, which possibly mediate the reported relationship between VSI and cognitive decline. In contrast, ASI appears not associated with AD pathologies but may contribute to cognitive decline via other mechanisms.