Eyes Of Individuals Research Articles

A protocol for a single center, randomized, controlled trial comparing the clinical efficacy of 3% diquafosol and 0.1% hyaluronic acid in diabetic patients with dry eye disease

BackgroundThe global prevalence of diabetes mellitus (DM) continues to rise and 70% of diabetic individuals have dry eye disease (DED) that leads to subsequent abnormalities of the corneal epithelium, corneal nerves, tear film, or corneal endothelium. In addition, persons with diabetes produce fewer tear secretions than healthy individuals. While several anti-inflammatory drug-based therapies for dry eye in diabetic individuals are currently being administered, their efficacy has not been studied in detail. Therefore, the aim of this study was to compare the effectiveness of 3% diquafosol (DQS) vs 0.1% hyaluronic acid (HA) eye drops in diabetic dry eye patients.MethodsThis triple-blind randomized, control trial will include 202 diabetic-related DED and will be assigned to DQS (n = 101) and HA (n = 101) one drop, six times per day for 8 weeks. Tear film lipid layer, non-invasive breakup time, conjunctivocorneal staining score, corneal sensitivity, tear MMP-9 levels, meibomian gland expression and quality, tear meniscus height, corneal nerves, immune/inflammatory cell change, conjunctival hyperemia, and ocular surface disease index questionnaire score will be assessed and compared at baseline, week 4, and week 8.DiscussionThis study will be a standardized, scientific, clinical trial designed to evaluate the therapeutic effects and safety of DQS and HA for diabetic dry eye treatment.Trial registrationClinicalTrials.govNCT05682547. Registered on December 05, 2022.

Choroidal thickness measurement in central serous chorioretinopathy using swept source optical coherence tomography: an observational study

Background: Central serous chorioretinopathy (CSCR) is a common retinal condition with an increased risk of recurrence. Traditional approaches have made choroidal visualization challenging, but recent advances in optical coherence tomography (OCT) innovation have permitted the collection of more accurate choroidal visualizations. This study aimed to measure choroidal thickness in eyes with active CSCR as well as in the unaffected opposite eyes of these same individuals. Methods: This research was conducted at the ophthalmology division in Ghazi Al-Hariri hospital from the 1st of October 2019 until the 31th of March 2020. A total of 49 people, corresponding to 65 eyes, were included in the study. Among these participants, 16 individuals presented with central serous chorioretinopathy (CSCR), affecting a total of 32 eyes. The CSCR individuals were further split into two groups: "group A" consisted of 20 eyes with active CSCR, and "group B" encompassed the remaining 12 unaffected opposite eyes. Additionally, 33 individuals who were age and gender-matched served as controls assigned as "group C". Results: The choroid exhibited a substantial rise in thickness across each of the nine sectors in group A as compared to group C. Similarly, group B showed a significant increase in choroidal thickness in relation to group C. The mean subfoveal choroidal thickness (SFCT) was measured as follows: 474.55μm, 437.5μm, and 292.03μm among groups A, B, and C, correspondingly. These differences were identified as clinically significant for both A vs. C and B vs. C. Conclusions: This study's findings indicate a thickening of the choroid in both eyes exhibiting active CSCR, as well as in the unaffected opposite eyes of those with the disease.

Narrowing Ratio of Retinal Veins at Arteriovenous Crossing in Patients With Branch Retinal Vein Occlusion Versus That in Healthy Individuals.

This cross-sectional study aimed to clarify the differences in the retinal venous narrowing ratio (VNR) at retinal arteriovenous crossing by optical coherence tomography (OCT) among the eyes with branch retinal vein occlusion (BRVO), fellow eyes of patients with BRVO, and eyes of individuals without BRVO and to determine factors that influence the VNR. We studied 31 eyes of young participants, 54 eyes of an older control group, 56 fellow eyes of patients with BRVO, and 48 eyes with BRVO. Cross-sectional OCT images were used to determine the VNR at two arteriovenous crossings per eye. Overall, 378 arteriovenous crossings were analyzed. The VNR of arterial overcrossings of fellow eyes (27.7% ± 11.1%) and BRVO eyes (27.3% ± 9.76%) were significantly higher than those in the young (16.0% ± 7.9%, all P<0.001) and control (22.0% ± 8.81%, P<0.001, P=0.003, respectively) groups. The VNR of arterial overcrossings was significantly larger than that of venous overcrossings (24.0% ± 10.5% vs. 20.6% ± 13.0%, P=0.021). A linear mixed-effects model showed that the VNR was significantly higher in arterial overcrossings, crossings with larger arterial internal diameters, smaller venous internal diameters, and participants with older age and a BRVO history. The VNR in arterial overcrossings was higher in BRVO eyes and even in the fellow eyes. Thus, a higher VNR in arterial overcrossings may contribute to BRVO development, and crossings with factors contributing to higher VNR might be associated with a risk of BRVO.

Quantitative microvascular alterations in butterfly-shaped pattern dystrophy and adult-onset foveomacular vitelliform dystrophy

To study retinal microvascular parameters in patients with butterfly-shaped pattern dystrophy (BPD) and adult foveomacular vitelliform dystrophy (AFVD). This case-control study included BPD and AFVD patients in a tertiary university hospital. Eyes with known ocular disease and prior ocular surgery other than uncomplicated cataract surgery were excluded. Right eyes of healthy individuals without systemic or ocular disease were included as controls. En face 6×6mm angiograms were obtained with the RTVue XR Avanti (Optovue, USA). We used the Kruskal-Wallis test to compare vessel density (VD) values of the retina, optic disc and foveal avascular zone (FAZ) between groups. Dunn-Bonferroni correction was used for pairwise comparisons. Eighteen eyes of 10 BPD patients, 17 eyes of 9 AFVD patients, and 26 right eyes of 26 controls were included. Six patients in the BPD, 4 patients in the AFVD, and 16 patients in the control group were female. The groups did not differ by sex (P=0.650). AFVD patients were of higher mean age (64.3±7.8) than BPD patients (55.9±11.1) and controls (53.6±5.5) (P=0.008, p=0.009). In BPD (P=0.008, P=0.044) and AFVD (P=0.006, P=0.002), parafoveal and perifoveal vessel density (VD) of the superficial capillary plexus were lower than controls. Parafoveal VD of the deep capillary plexus in AFVD was lower than in controls (P=0.012). There was no difference in the foveal avascular area between groups (P=0.563). Optic discs parameters did not differ. A comparable loss in vascular density may indicate shared pathophysiology or represent a common sign of impairment in retinal homeostasis. Further research is needed to clarify underlying microvascular pathogenetic mechanisms in pattern dystrophies.

Choroidal morphology and microvascular structure in eyes of patients with idiopathic normal pressure hydrocephalus before and after ventriculo-peritoneal shunt surgery

The present study aims to investigate the choroidal morphology and microvascular structure in eyes of patients with idiopathic normal pressure hydrocephalus (iNPH) compared with the eyes of healthy age-matched individuals, and to assess the choroidal structure in eyes of iNPH patients before and after shunt surgery using Optical Coherence Tomography (OCT). The primary objective was to assess the choroidal morphology in eyes of iNPH patients before and after ventriculo-peritoneal (VP) surgery compared to age and sex-matched healthy individuals. The secondary objective was to compare the choroidal morphology of iNPH patients before and after a mean of 56 days from shunt surgery. Eighteen consecutive patients diagnosed with iNPH and 18 healthy controls were prospectively recruited between November 2021 and October 2022. Spectral-domain optical coherence tomography (SD-OCT) with enhanced depth imaging (EDI) was conducted before and within 4 months after shunt surgery. Images were binarized using the ImageJ software, and the choroidal vascular index (CVI) was calculated. Sub-foveal choroidal thickness (SFCT), total choroidal area (TCA), luminal choroidal area (LCA), and stromal choroidal area (SCA) were significantly increased in iNPH patients before surgery compared to the control group (p < 0.05). SFCT, TCA, and SCA were significantly increased in iNPH patients after surgery compared to the control group (p < 0.05). There were no differences in the CVI between iNPH patients and controls. No statistical differences in the choroidal structure were observed before and after VP shunt surgery (p > 0.05). In conclusion, the choroid was thicker in iNPH patients before and after VP shunt compared to age-matched healthy individuals. However, there were no difference in the choroidal microstructure in the eyes of iNPH patients before and after a mean of 3 months from VP shunt surgery.

Analysis of intraocular pressure in healthy individuals and type 2 diabetes patients with and without diabetic retinopathy: A comparative study.

Objective: To compare intraocular pressure between normal subjects and Type 2 diabetics with and without diabetic retinopathy. Study Design: Comparative study. Setting: Sindh Institute of Ophthalmology &amp; Visual Sciences Hyderabad Sindh Pakistan. Period: June 2021 to December 2021. Material &amp; Methods: The ages ranged from 45 to 75 years old. The blood glucose level, intraocular pressure, and indirect ophthalmoscopy were measured between 9:00 am and 11:00 am with an iCare tonometer and an ophthalmoscope. The data were analyzed in SPSS 23.0. Results: A total of 112 participants were included. The average intraocular pressure (IOP) in both eyes of individuals with type 2 diabetes and no diabetic retinopathy is slightly higher than in the non-diabetic population, but the difference is not statistically significant (p&gt;0.05). Group A was composed of 16 males (50.0%) and 16 females (50.0%), while group B had 13 males (40.6%) and 19 females (59.3%). In group C, there were 19 males (59.3%) and 13 females (40.6%), and in group D, 7 males (43.7%) and 9 females (56.2%). All female participants were in the post-menopausal phase. Conclusion: In the study, researchers found that the intraocular pressure of diabetics was higher than non-diabetics. Diabetes progression reduced intraocular pressure in non-proliferative diabetic retinopathy and increased it in proliferative diabetic retinopathy relative to the former, but the difference was not statistically significant.

Vessels characteristics in familial exudative vitreoretinopathy and retinopathy of prematurity based on deep convolutional neural networks.

The purpose of this study was to investigate the quantitative retinal vascular morphological characteristics of Retinopathy of Prematurity (ROP) and Familial Exudative Vitreoretinopathy (FEVR) in the newborn by the application of a deep learning network with artificial intelligence. Standard 130-degree fundus photographs centered on the optic disc were taken in the newborns. The deep learning network provided segmentation of the retinal vessels and the optic disc (OD). Based on the vessel segmentation, the vascular morphological characteristics, including avascular area, vessel angle, vessel density, fractal dimension (FD), and tortuosity, were automatically evaluated. 201 eyes of FEVR, 289 eyes of ROP, and 195 eyes of healthy individuals were included in this study. The deep learning system of blood vessel segmentation had a sensitivity of 72% and a specificity of 99%. The vessel angle in the FEVR group was significantly smaller than that in the normal group and ROP group (37.43 ± 5.43 vs. 39.40 ± 5.61, 39.50 ± 5.58, P = 0.001, < 0.001 respectively). The normal group had the lowest vessel density, the ROP group was in between, and the FEVR group had the highest (2.64 ± 0.85, 2.97 ± 0.92, 3.37 ± 0.88 respectively). The FD was smaller in controls than in the FEVR and ROP groups (0.984 ± 0.039, 1.018 ± 0.039 and 1.016 ± 0.044 respectively, P < 0.001). The ROP group had the most tortuous vessels, while the FEVR group had the stiffest vessels, the controls were in the middle (11.61 ± 3.17, 8.37 ± 2.33 and 7.72 ± 1.57 respectively, P < 0.001). The deep learning technology used in this study has good performance in the quantitative analysis of vascular morphological characteristics in fundus photography. Vascular morphology was different in the newborns of FEVR and ROP compared to healthy individuals, which showed great clinical value for the differential diagnosis of ROP and FEVR.

Comparison of peripapillary vascular density as measured by optical coherence tomography angiography between various types of open-angle glaucoma

The purpose of this study is to compare the peripapillary vascular density in patients with various types of open-angle glaucoma (primary open-angle glaucoma, pseudoexfoliative glaucoma and pigmentary glaucoma) with healthy subjects by optic coherence tomography angiography (OCTA). Twenty-seven eyes with diagnosed POAG, thirty-four eyes with diagnosed PXG, twenty eyes with diagnosed PG and thirty eyes of healthy individuals were included in our study. Peripapillary vessel density measurements were performed with all images; (AI-DD), intra-disc (ID-DD) and peripapillary (PP-DD); measurement of vascular density in the radial peripapillary capillary network was performed by OCTA. The Kruskal-Wallis test and post-hoc test were performed for statistical analysis. AI-DD was 50.76±2.07% in the healthy group, 47.12±2.57% in POAG, 39.71±6.64% in PXG, and 43.37±1.55% in PG. ID-DD was 50.49±3.74% in the healthy group, 49.51±6.83% in POAG, 38.42±13.46% in PXG, and 40.9±4.45% in PG. PP-DD was 51.26±3.12% in the healthy group, 50.13±3.04% in POAG, 42.31±7.31% in PXG, and 47.6±1.40% in PG. While it was found that all image and intra-disc vascular density measurements were statistically significantly lower in the PG and PXG group compared to the healthy group and the POAG (P<0.001), there was no significant difference between PXG and PG or between the control group and POAG. The lower radial peripapillary capillary density in PXG and PG compared to the POAG and healthy groups suggests that the blood flow around the optic disc is negatively affected in these patients.

A Clinical Study on Severity of Dry Eye in Individuals with Pterygium at a Tertiary Hospital in South Kerala.

To assess the severity of dry eye in individuals with pterygium in a tertiary care hospital. This cross-sectional study was done on 70 individuals with pterygium who were attending the outpatient department of ophthalmology. Objective dry eye tests were done, including Schirmer's tests 1 and 2, tear film breakup time, and tear meniscus height (TMH). In this study, patients with one or more positive clinical tests were diagnosed to have dry eyes. Dry eye was graded as mild, moderate, severe, or severe disabling. Among 140 eyes, 79 eyes had pterygium. According to Schirmer's test 1 in eyes with pterygium, 29.1% of the eyes had mild dry eyes, and 26.6% had moderate dry eyes. According to Schirmer's test 2 in eyes with pterygium, 25.3% of the eyes had mild dry eyes, and 26.6% had moderate dry eyes. Tear film breakup time in eyes with pterygium showed a mild dry eye in 25.3% and moderate dry eye in 17.7%. TMH in eyes with pterygium was low at 7.6%. The majority of eyes with pterygium have mild or moderate dry eye according to Schirmer's test 1, Schirmer's test 2, and tear film breakup time. No eyes with pterygium have severe dry eyes. TMH was also low in a small proportion of eyes with pterygium. Dry eye evaluation by Schirmer's test and tear breakup time is, therefore, a crucial clinical tool for early detection and prompt management of dry eye syndrome in pterygium patients.

Netflix İn Leisure: A Qualitative Research On Users View

The aim of this study is to examine the recreational value and the views on the application from the eyes of individuals who spend time on Netflix, one of the video-on-demand platforms. With these platforms, where digital channels are customer-focused, the products in international media became visible. Diversity, rapid response to demand, individual-specific systematic development of the algorithm, and accessibility without space and time limits have developed sustainable leisure time tracking behavior in the individual.In this study, the "case study" method, one of the qualitative research methods, was used as the basis. The study was conducted using one-on-one, in-depth interview techniques in qualitative research. "Semi-structured interview questions" were used as a data collection tool in the study. 20 Netflx users from different ages, trends, and genders participated in the study on a voluntary basis. In the analysis of the data recorded with voice recorders, the Maxqda-2020 qualitative data analysis program was used. As a result of the analysis of the data obtained from one-on-one, in-depth interviews, 15 codes were revealed. It has been determined that the codes obtained from the interviews are grouped under six themes: motivation, comment, attitude, algorithm, type of program, and participation type.Considering these results, it is predicted that Netflix usage will continue intensively. It has been determined that the motivation elements are directly related to the perception of leisure time boredom and content richness. It has been determined that attitudes are formed by liking or disliking, respect for values, and cultural relations. In addition, it has been stated that they see the application mostly as a method of discharge. In light of these results, the Netflix application is seen and evaluated as a tool for enriching the content, international accessibility, and feedback, as well as a leisure time evaluation tool.Keywords: Leisure, Netflix, Recreation, Watching

Evaluation of corneal topography and higher order aberrations of the fellow eye in unilateral keratoconus

Purpose To assess parameters of corneal topography and higher order aberrations (HOAs) data in the apparently normal contralateral eyes of unilateral keratoconus (KC) cases in comparison with normal eyes of healthy individuals. Patients and methods This observational case-control study included 70 eyes divided into two equal groups; group A was the fellow eyes of unilateral keratoconus patients and group B included the normal control eyes. They were examined by Schimpflug camera to extract the study parameters (keratometry indices, the inferior-superior(I-S) difference at 4 mm, posterior elevation (PE), front and back difference, thickness progression index, corneal pachymetry, multimetric D index (D index), topometric indices and Zernike analysis). Results In comparing the study data between Groups A and B, we demonstrated that ISV, IVA, and CKI had no difference between the two groups. But other topometric parameters showed statistically significant differences between the two groups. Assessment of corneal aberrations revealed that the RMS HOA, vertical coma, and spherical aberrations were associated with significant increases in the apparently normal eyes of unilateral KC cases in comparison with healthy individual eyes (P&lt;0.001). Conclusion Fellow eyes of unilateral KC cases seem not to be totally normal. And so, it is recommended to regularly examine these eyes at close intervals to catch up any abnormality and to avoid KC progression.

P.143 Exploring end-of-life decision making and perspectives on Medical Assistance in Dying through the eyes of individuals living with cervical spinal cord injuries in Nova Scotia

Background: Individuals with spinal cord injuries (SCI) are invariably faced with decisions around management of their injury; from life prolonging to palliating interventions. End-of-life (EOL) decision-making has recently come to include conversations around Medical Assistance in Dying (MAID), as legislation changes have expanded access. The intersection between SCI and MAID, and other EOL decision-making has yet to be explored. We sought to discuss awareness and perspectives on MAID and EOL decision-making. Methods: We conducted hour-long semi-structured interviews with 15 individuals living with cervical SCI. Interviews took place over the telephone or virtually, and transcripts were analyzed using an iterative coding process and thematic analysis. Results: There was a global lack of awareness of options, that changed with time as participants assumed more independent roles in decision making. Participants possessed general awareness of MAID, but variable understanding of who legislation applies to. The way individuals with SCI could interact with MAID legislation brought forth interesting discussions around bodily autonomy and self-determination. Some voiced their own desire initially for MAID, while others vacillated or were more strongly opposed. Conclusions: This study emphasizes the importance of engaging with difficult conversations, and striking the balance of respecting autonomy and self-determination, within the constraints of each individual’s situation.

Misperceptions and Minipublics: Does Endorsement of Expert Information by a Minipublic Influence Misperceptions in the Wider Public?

ABSTRACT As misperceptions undermine the factual basis for public debate, they pose a serious challenge to expert knowledge and the democratic legitimacy of public policy informed by expert evidence. In this paper, we theorize that in times of politicization and polarization of expertise, endorsement of expert information by a minipublic can serve to legitimize expert correction and render it more persuasive in the eyes of individuals. In developing our theoretical argument, we focus on the effect of a minipublic on individuals in the wider public – those who did not participate in such institutions. To test our theoretical predictions, we designed, pre-registered and fielded two experiments in the US (N = 2168) and one experiment in Ireland (N = 1125), during two different waves of COVID-19. The results show that minipublic endorsement significantly increases the uptake of expert information among (nonparticipating) citizens. Furthermore, when an expert correction explicitly asserts a scientific consensus, it is as effective as the minipublic endorsement. The findings have implications for the research on misperceptions, expertise and deliberative institutions.

Состояние хориокапилляров у пациентов с парацентальной острой срединной макулопатией

Purpose. To evaluate with optical coherence tomography angiography the status of the choriocapillaris in the eyes of patients with resolved paracentral acute middle maculopathy (PAMM). Method. Nine patients with unilateral resolved PAMM, 14 age-matched healthy individuals, and 16 age-matched patients with unilateral retinal vein occlusion (RVO) were included. The choriocapillaris flow area, and the number of choriocapillaris flow voids was compared between the eyes of healthy individuals, both eyes of the PAMM patients, and the fellow eyes of unilateral RVO patients. Results. The number of choriocapillaris flow voids in the unaffected eyes of PAMM patients was statistically significantly higher than in the eyes of healthy individuals (p &lt; 0.001) and in the fellow eyes of unilateral RVO patients (p = 0.022). The choriocapillaris flow area in the unaffected eyes of PAMM patients was statistically significantly lower than in the eyes of healthy individuals (p &lt; 0.001) and in the fellow eyes of unilateral RVO patients (p = 0.019). There was no difference in the status of the choriocapillaris between two eyes of PAMM patients. Conclusion. Eyes of patients with resolved PAMM have a substantial decrease of choriocapillaris perfusion. Keywords: paracentral acute middle maculopathy; choriocapillaris; vessel density; optical coherence tomography angiography; retinal vein occlusion

Peripapillary nerve fiber layer in patients with iron deficiency anemia: A cross-sectional study in a tertiary eye care center in Central India.

The aim of this study is to evaluate the effect of iron-deficiency anemia (IDA) on peripapillary retinal nerve fiber layer (RNFL) thickness using spectral-domain optical coherence tomography (SD-OCT). The study was conducted at tertiary eye care center in Central India. This study was a prospective, cross-sectional, case-control, and observational study. In the present study, 58 eyes of patients with IDA were compared with 58 eyes of healthy individuals. All individuals underwent a thorough hematological, clinical, and ophthalmic examination, followed by peripapillary RNFL analysis using SD-OCT. A total of 116 eyes were included in the study. The average RNFL thickness (RNFLT) in the cases was 97.26 ± 5.96, and 102.32 ± 6.26 (P = 0.005) in controls. There was a significant RNFL loss in the temporal (66.76 ± 6.1, P = 0.02), superior (119.66 ± 10.47, P = 0.01), nasal (73.59 ± 9.52, P = 0.003), and inferior (129.05 ± 10.96, P = 0.001) quadrants in the cases and controls. Serum hemoglobin, iron, ferritin, total iron-binding capacity, and transferrin saturation were lower in the cases (P < 0.05). A positive correlation was observed between average RNFLT and hemoglobin (r = 0.321), iron (r = 0.122), ferritin (r = 0.152), and transferrin (r = 0.190) levels. In patients with IDA, RNFLT was decreased in all quadrants compared to normal healthy individuals. The inferior and nasal RNFL showed a significant decrease in thickness. The presence of myopia, glaucoma, and diabetic and hypertensive retinopathy can exert an additive effect in the thinning of RNFLs and cause significant visual loss; hence, the correction of anemia is essential. There is a pressing need to raise public and health professional awareness of these problems and their prevention, diagnosis, and management.

A Protocol to Evaluate and Quantify Retinal Pigmented Epithelium Pathologies in Mouse Models of Age-Related Macular Degeneration.

Age-related macular degeneration (AMD) is a debilitating retinal disorder in aging populations. It is widely believed that dysfunction of the retinal pigmented epithelium (RPE) is a key pathobiological event in AMD. To understand the mechanisms that lead to RPE dysfunction, mouse models can be utilized by researchers. It has been established by previous studies that mice can develop RPE pathologies, some of which are observed in the eyes of individuals diagnosed with AMD. Here, we describe a phenotyping protocol to assess RPE pathologies in mice. This protocol includes the preparation and evaluation of retinal cross-sections using light microscopy and transmission electron microscopy, as well as that of RPE flat mounts by confocal microscopy. We detail the common types of murine RPE pathologies observed by these techniques and ways to quantify them through unbiased methods for statistical testing. As proof of concept, we use this RPE phenotyping protocol to quantify the RPE pathologies observed in mice overexpressing transmembrane protein 135 (Tmem135) and aged wild-type C57BL/6J mice. The main goal of this protocol is to present standard RPE phenotyping methods with unbiased quantitative assessments for scientists using mouse models of AMD.

Evaluation of the Effect of İnfection and İmmunity on the Tear Film by Scheimpflug-Placido Disc Topography- A Case Control Study.

We aimed to compare the tear film stability of individuals who had recovered from coronavirus disease (COVID-19), that of individuals vaccinated against COVID-19 and that of healthy individuals in a control group. This study included 61 eyes of 61 post-COVID-19 patients, 63 eyes of 63 participants who had received at least two doses of the SARS-CoV-2 mRNA BNT162b2 (Pfizer-BioNTech) vaccine, and 57 eyes of healthy individuals in a control group. We compared the groups' tear film stability. The mean non-invasive first tear break-up time (NIF-BUT) value was 4.1±2.7 seconds in the post-COVID-19 group, 4.7±2.9 seconds in the vaccinated group, and 5.8±2.8 seconds in the control group. This value was statistically significantly lower in the post-COVID-19 and vaccinated groups than in the control group (p= 0.007). The rate of superotemporal (ST) quadrant breakup, statistically significantly higher in the vaccinated group than in the other two groups (p=0.001). According to a qualitative examination of the results, at least one breakup occurred in 47 (77%) of the post-COVID-19 participants' eyes, 50 (79.4%) of the vaccinated group's eyes, and 33 (57.9%) of the control group's eyes. In terms of this qualitative value, the post-COVID-19 and vaccinated groups had significantly higher breakup rates than the control group (p=0.018). Destabilization in the tear film was more common in both the post covid group and the vaccinated group. In addition to individuals who have post-Covid, we think that post-vaccination individuals should be followed closely in terms of ocular surface diseases.

Evaluation of choroidal vascularity index in systemic sclerosis patients.

To investigate the comparison of choroidal vascularity index (CVI) between patients with systemic sclerosis and healthy individuals. This study was designed prospective non-randomized cross-sectional study. Eighty-six eyes (43 patients) with limited cutaneous systemic sclerosis (lcSSc), 60 eyes (30 patients) with diffuse cutaneous systemic sclerosis (dcSSc) and 60 eyes (30 subjects) of age-and sex-matched healthy individuals were recruited. Subfoveal choroidal thickness, CVI and modified Rodnan skin score (mRSS) were evaluated. Enhanced depth imaging- optical coherence tomography scans were binarized using Niblack's autolocal threshold and CVI was determined as the luminal choroidal area/total choroidal area ratio. The mean CCT values were 268.00±68.59 µm, 286.90±70.88 µm, 321.73±94.13 µm in lcSSc group, dcSSc group and control group, respectively. The mean CVI was 61.84±2.84% in lcSSc group, 54.62±5.84% in dcSSc group and 62.41±4.13% in control group (p=0.001). The mean CVI of the SSc patients was 58.91±5.58 and there was significant difference between control group (p<0.001). The mean mRSS was 3.84±2.50 in lcSSc group and 14.07±6.81 in dcSSc group (p<0.001). There was a statistically significant negative correlation between mRSS and CVI (r=-0.448, p<0.001) CONCLUSION: Choroidal vascularity index provides valuable information to monitor the disease progression and lower CVI values seem to be related to the disease severity in patients with systemic sclerosis.

AN ATYPICAL RETINAL VASCULITIS, ANEURYSMS AND NEURORETINITIS IRVAN: RARE CASE REPORT AND MANAGEMENT

Idiopathic retinal vasculitis, aneurysms, and neuroretinitis (IRVAN) syndrome is a rare and progressive disorder that predominantly affects both the eyes of young female individuals and can threaten visual function. Peripheral ischemia and macular exudation are regular ndings in patients. The treatment options include panretinal photocoagulation (PRP), systemic immunosuppression,and intravitreal antiangiogenic and corticosteroid therapy. Here we are presenting a case of old chronic IRVAN presenting as recurrent epiretinal membrane. Patient was underwent ERM removal and Dexamethasone implant to prevent recurrence in this case.

GLOKOM HASTALARINDA SHEAR WAVE ELASTOGRAFİ BULGULARI

OBJECTIVE: Our aim is to measure the stiffness values in different regions of the eye with shear wave elastography (SWE) in patients with glaucoma and to compare the results with healthy eyes to investigate whether there is a change in the elasticity of the ocular compartments in glaucoma patients.MATERIAL AND METHODS: In this study, we compared 12 patients with open-angle glaucoma and 32 healthy volunteers using an SWE-equipped ultrasonography device. Only the right eye was evaluated in all patients. First, the eye globe was generally examined in B-mode. Then, the stiffness values of the optic nerve head, retro-orbital nerve, sclera-retina complex and retro-orbital adipose tissue in the posterior segment and the stiffness values of the cornea, lens and anterior chamber in the anterior segment of the eye were measured with SWE in kiloPascal and both groups were compared statistically.RESULTS: No statistically significant differences were found between the patient and control groups in terms of the stiffness values recorded in the measurements performed in different parts of the eye.CONCLUSIONS: Although SWE is an easily applicable method, no significant differences were found between glaucoma and control groups. However, thanks to this study, reference values for different parts of the eye in normal individuals have been determined.