Myopic Degeneration Research Articles

Clinico-Radiological-Pathological Correlation of Visual Loss in COVID-Associated Rhino-Orbito-Cerebral Mucormycosis.

Purpose:To correlate the clinical, radiological, and histopathological features in Covid-associated Rhino-orbito-cerebral mucormycosis cases presenting with acute visual loss.Design:Cross-sectional study.Methods:Covid-associated Rhino-orbito-cerebral mucormycosis cases with unilateral visual loss, planned for exenteration, underwent orbital and ophthalmological ocular examination. The available radiological sequences, doppler ultrasonography and histopathology findings were correlated with clinical manifestations.Results:The median age was 51 years and the male: female ratio was 3:1. All except one presented with unilateral ophthalmoplegia. The ocular media were hazy in 2 eyes. In 8 eyes, retinal changes were suggestive of occlusion of CRA (6), combined occlusion of CRA and central retinal vein (1), and myopic degeneration with hypertensive retinopathy (1). The contralateral eye showed retinal ischemic changes in one patient. Radiological imaging showed orbital apex involvement in the 10 affected eyes and one contralateral eye. Ipsilateral cavernous sinus thrombosis, diffusion restriction on MRI of optic nerve, internal carotid artery narrowing/thrombosis, and cortical watershed infarcts were seen in 8, 4, 4, and 2 cases, respectively. The blood flow in CRA and ophthalmic artery was absent or reduced in all the 10 affected eyes and in 1 contralateral eye. On histopathology, orbital fat necrosis, fungal hyphae, acute inflammation, granuloma formation, ischemic thrombosis of ophthalmic artery was observed in 10 specimens. CRA was patent in 9 and thrombosed in 1 eye. Optic nerve was ischemic in 8 and viable in 2 eyes.Conclusion:Acute visual loss in ROCM cases is associated with orbital apex involvement and thrombotic ischemia of ophthalmic artery. Cessation of flow in CRA possibly occurs secondary to ophthalmic artery thrombosis.

A Case Report: Electrophysiological Findings in Degenerative Myopia

We report electrophysiological findings in a patient that has degenerative myopia. The visual acuity of a 48 years old male patient was counting fingers from 0.1 with refraction (-11.00, -1.00 x115) in the right eye and 0.6 with refraction (-5.00, -1.50 x35) in the left eye. Bilateral anterior segment examination was normal however; on the fundus examination, there were atrophic scar area in the macula and pigmented degenerative areas in the inferior on the right, while there were chorioretinal atrophy and degenerative areas in the peripheric retina on the left. Normal latency response was obtained in VEP. In the right eye, a low amplitude and long latency response was obtained with the 120' pattern, but no response was obtained with the other patterns. In the left eye, there was a response to patterns shrinking to 15', the p100 wave was minimally low for age, and its latency was within normal limits. 7' pattern could not be answered. With ERG, bilateral rod b wave responses were subnormal for age, and cone b wave responses were low. Oscillatory responses were obtained bilaterally low.

Analysis of postoperative intraocular pathologies in patients with mature cataracts.

To examine the prevalence and risk factors of intraocular pathologies after mature cataract surgery. The medical records of 115 patients (115 eyes) diagnosed with brunescent or white cataracts, who underwent surgery at a single primary center between January 2018 and August 2021 were retrospectively reviewed. Dense cataracts precluded preoperative fundus examination in all eyes; however, patients with fundus examination results within 3 months after cataract surgery were included. Logistic regression analyses were performed to identify factors associated with intraocular pathologies. Intraocular pathologies were observed in 37 eyes (32.2%) 11.8 ± 13.9 days postoperatively. The most common abnormalities were drusen (6.1%), myopic degeneration (5.2%) and diabetic retinopathy (4.3%). Intraocular pathology in the fellow eye was associated with posterior segment pathology in mature cataract eyes (odds ratio, 47.72; P < 0.001). The prevalence of each intraocular pathology found after mature cataract surgery was unremarkable. This study provides clinically useful evidence for clinicians to explain the risk of posterior segment pathology in patients with mature cataracts.

Strikingly High Myopia in Aland Island Eye Disease

A 48-year-old myopic white man presented with poor vision, nyctalopia, and photophobia in both eyes since childhood. Best corrected visual acuity was 20/150 in the right eye and counting fingers in the left eye, refracting –26 diopters (D) with axial length of 35 mm in both eyes. Both eyes showed nystagmus, mature cataracts, vitreous syneresis, hypopigmented myopic degeneration, foveal hypoplasia, extensive multilayered lattice with holes (Fig A-B), and marked staphylomas. Prophylactic barricade laser around the lattice was performed before cataract surgery.

Clinical features of patients with PEVAC in University Hospital of Canarias

AbstractPurposeTo investigate the clinical characteristics of Perifoveal Exudative Vascular Anomalous Complex (PEVAC) patients diagnosed in the University Hospital of Canarias.MethodsThis retrospective study included 7 eyes (of 7 patients) diagnosed with PEVAC. We reviewed the demographic characteristics. All of our patients had undergone a complete ophtalmological examination including color retinography, autofluorescence, Optical Coherence Tomography (OCT), fluorescein angiography(FA) and OCT‐Angiography (OCTA). We also reviewed the follow‐up information.ResultsOf our 7 patients, 3 were women and 4 were men. The average age and standard deviation were 71.0 +‐12.8 years. Average visual acuity was 0.54 + −0.24.Of our 7 patients, 4 had no remarkable comorbidities, 2 had age‐related macular degeneration and the resting patient had myopic degeneration. PEVAC presented as a big isolated perifoveal aneurysm. On OCT PEVAC appeared as a round hyperreflective lesion, typically surrounded by intraretinal cystic spaces. FA showed a well defined hyperfluorescent lesion with variable leakage. OCTA revealed that the isolated aneurysmatic lesion was located in the superficial capillary plexus in 2 cases; in the deep capillary plexus in 4 cases and in one cases it seemed to be in the intermediate plexus. In 5 cases, there was only subtle exudation that did not require treatment, remaining stable during follow‐up. In two cases, exudation was greater, so we treated them with anti‐VEGF, with partial response.ConclusionsPEVAC is an aneurysmatic isolated perifoveal abnormality that can occur in patients with or without retinal disease. PEVAC did not respond to anti‐VEGF therapy.Bibliography Querques G, Kuhn D, Massamba N, Leveziel N, Querques L, Souied EH. Perifoveal Exudative Vascular Anomalous Complex. J Fr Ophtalmol 2011; 34(8): 559.e1–4. Sacconi R, Freund KB, Yannuzzi LA, Dolz‐Marco R, Souied E, Capuano V, et al. The Expanded Spectrum of Perifoveal Exudative Vascular Anomalous Complex. Am J Ophthalmol 2017; 184:137–146. Mrejen S,Le HM,Nghiem‐Buffet S,Tabary S,Quentel G,Cohen SY. Insights into Perifoveal Exudative Vascular Anomalous Complex. Retina 2020;40(1):80–86.

The Myopia Control in Real Clinical Practice: The Results of an Expert Study

The article presents expert study results about myopia control. The study was conducted by Russian eye care practitioners in 2019.Purpose. to summarize the views of eye care practitioners on the problem of myopia control in Russia.Methods. The study was conducted by mailing (sending) questionnaires to practitioners. The questionnaire contained 9 questions. Base questionnaire was developed by British Contact Lens Association (BCLA) for global study, translated into Russian and updated with items of interest to Russian practitioners.Results. 356 questionnaires were received and processed. Concern increasing frequency of pediatric myopia was highest (9.0 ± 0.08 on a 10 point scale). Orthokeratology was perceived to be the most effective method of myopia control, followed by myopia control soft contact lenses and increased time outdoors. Perceived effectiveness rated as percentage was 50.7 ± 1.6 %, 44.9 ± 1.8 % и 42.9 ± 1.7 % respectively. Perifocal spectacles correction was perceived to be the most effective method in the Southern area of Russia (56.8 ± 11.1 %), atropine — in the Northwestern Federal District (39.5 ± 7.1 %), scleroplasty — in the Far East (55.1 ± 7.6 %). Under-correction was perceived to be the least effective method in all areas (11.6 ± 1.0 %). Increased time outdoors was a priority for most practitioners (on average 94.0 ± 7.8 prescriptions per month by one practitioner). Practitioners prescribed single vision spectacles as the primary mode of correction for myopic patients (47.2 ± 3.6 prescriptions per month by one practitioner). Phenylephrine instillation was used often (49.4 ± 3.6 prescriptions per month by one practitioner). This trend was in most areas. Vision therapy was used most frequent in Siberia and the Urals and in the Far East (70.4 ± 11.5 и 20.0 ± 5.2 prescriptions per month by one practitioner respectively). The most common reasons practitioners gave for not adopting myopia control strategies were: they were felt to be uneconomical (42.1 %); they considered there to be inadequate information about the modalities (22.2 %). 45 % practitioners from the Far East called the last reason the main one. 42.9 % practitioners from Northwestern Federal District did not believe that these are any more effective methods then single vision correction.Conclusion. The active promotion and introduction into everyday clinical practice of myopia control methods that have proven to be highly effective could help reduce the frequency of progressive and degenerative myopia

Rapid progression of chorioretinal atrophy in punctate inner choroiditis: a case report

BackgroundThe chorioretinal inflammatory lesions occurring in punctate inner choroiditis evolve into punched-out atrophic scars. Typically, the progression is gradual. We report a case of highly myopic punctate inner choroiditis with rapid progression of chorioretinal atrophy.Case presentationA 48-year-old Japanese woman with high myopia presented with decreased visual acuity. Best-corrected visual acuity was 20/28 in the right eye and 20/16 in the left eye; axial length was 29.0 mm and 28.7 mm, respectively. Fundoscopy revealed an epiretinal membrane in the left eye. Three years later, the best-corrected visual acuity in the left eye had decreased to 20/33; at this time, the patient underwent vitrectomy with epiretinal membrane and internal limiting membrane peeling in this eye. Six months later, the best-corrected visual acuity in the left eye decreased suddenly to 20/100. Optical coherence tomography showed a nodule-like lesion in the outer retina with disruption of the retinal pigment epithelium and a focally thickened choroid, compatible with PIC. One month later, the choroidal thickness had decreased. The central chorioretinal atrophy expanded rapidly at a rate of 0.45 mm2/year over the next 3 years, and new areas of patchy focal chorioretinal atrophy developed in the perifovea.ConclusionsRapid progression of chorioretinal atrophy was observed in a patient with punctate inner choroiditis. Because punctate inner choroiditis is often associated with degenerative myopia, the retina is fragile and may be susceptible to mechanical damage. This case report alerts clinicians to the need for careful management of patients with punctate inner choroiditis, especially after vitrectomy.

Myopic macular pits: a case series with multimodal imaging

ObjectiveTo characterize the multimodal retinal findings of myopic macular pits, a feature of myopic degeneration. MethodsA case series of patients with myopic macular pits were studied with multimodal imaging including color fundus photography, fundus autofluorescence (FAF), near infrared reflectance (NIR), spectral domain optical coherence tomography (OCT), optical coherence tomography angiography (OCTA), fluorescein angiography (FA) and indocyanine green angiography (ICG). ResultsNine eyes of 6 patients with myopic macular pit were examined. Four patients presented with multiple pits and 3 with bilateral involvement. All pits were localized in a region of severe macular chorioretinal atrophy associated with myopic posterior staphyloma. In 3 eyes, the entrance of the posterior ciliary artery through the sclera was noted at the base of the pit. Schisis overlying the pit or adjacent to the pit was identified in 3 patients. ConclusionMyopic macular pits are an additional rare sign of myopic degeneration, developing in regions of posterior staphyloma complicated by severe chorioretinal atrophy and thin sclera.

Automatic detection of pathological myopia using machine learning

Pathological myopia is a severe case of myopia, i.e., nearsightedness. Pathological myopia is also known as degenerative myopia because it ultimately leads to blindness. In pathological myopia, certain myopia-specific pathologies occur at the eye’s posterior i.e., Foster-Fuchs’s spot, Cystoid degeneration, Liquefaction, Macular degeneration, Vitreous opacities, Weiss’s reflex, Posterior staphyloma, etc. This research is aimed at developing a machine learning (ML) approach for the automatic detection of pathological myopia based on fundus images. A deep learning technique of convolutional neural network (CNN) is employed for this purpose. A CNN model is developed in Spyder. The fundus images are first preprocessed. The preprocessed images are then fed to the designed CNN model. The CNN model automatically extracts the features from the input images and classifies the images i.e., normal image or pathological myopia. The best performing CNN model achieved an AUC score of 0.9845. The best validation loss obtained is 0.1457. The results show that the model can be successfully employed to detect pathological myopia from the fundus images.

Biomechanics of Ophthalmic Crosslinking.

Crosslinking involves the formation of bonds between polymer chains, such as proteins. In biological tissues, these bonds tend to stiffen the tissue, making it more resistant to mechanical degradation and deformation. In ophthalmology, the crosslinking phenomenon is being increasingly harnessed and explored as a treatment strategy for treating corneal ectasias, keratitis, degenerative myopia, and glaucoma. This review surveys the multitude of exogenous crosslinking strategies reported in the literature, both “light” (involving light energy) and “dark” (involving non-photic chemical processes), and explores their mechanisms, cytotoxicity, and stage of translational development. The spectrum of ophthalmic applications described in the literature is then discussed, with particular attention to proposed therapeutic mechanisms in the cornea and sclera. The mechanical effects of crosslinking are then discussed in the context of their proposed site and scale of action. Biomechanical characterization of the crosslinking effect is needed to more thoroughly address knowledge gaps in this area, and a review of reported methods for biomechanical characterization is presented with an attempt to assess the sensitivity of each method to crosslinking-mediated changes using data from the experimental and clinical literature. Biomechanical measurement methods differ in spatial resolution, mechanical sensitivity, suitability for detecting crosslinking subtypes, and translational readiness and are central to the effort to understand the mechanistic link between crosslinking methods and clinical outcomes of candidate therapies. Data on differences in the biomechanical effect of different crosslinking protocols and their correspondence to clinical outcomes are reviewed, and strategies for leveraging measurement advances predicting clinical outcomes of crosslinking procedures are discussed.Advancing the understanding of ophthalmic crosslinking, its biomechanical underpinnings, and its applications supports the development of next-generation crosslinking procedures that optimize therapeutic effect while reducing complications.

Three-dimensional segmentation and depth-encoded visualization of choroidal vasculature using swept-source optical coherence tomography.

The choroid provides nutritional support for the retinal pigment epithelium and photoreceptors. Choroidal dysfunction plays a major role in several of the most important causes of vision loss including age-related macular degeneration, myopic degeneration, and pachychoroid diseases such as central serous chorioretinopathy and polypoidal choroidal vasculopathy. We describe an imaging technique using depth-resolved swept-source optical coherence tomography (SS-OCT) that provides full-thickness three-dimensional (3D) visualization of choroidal anatomy including topographical features of individual vessels. Enrolled subjects with different clinical manifestations within the pachychoroid disease spectrum underwent 15 mm × 9 mm volume scans centered on the fovea. A fully automated method segmented the choroidal vessels using their hyporeflective lumens. Binarized choroidal vessels were rendered in a 3D viewer as a vascular network within a choroidal slab. The network of choroidal vessels was color depth-encoded with a reference to the Bruch's membrane segmentation. Topographical features of the choroidal vasculature were characterized and compared with choroidal imaging obtained with indocyanine green angiography (ICGA) from the same subject. The en face SS-OCT projections of the larger choroid vessels closely resembled to that obtained with ICGA, with the automated SS-OCT approach proving additional depth-encoded 3D information. In 16 eyes with pachychoroid disease, the SS-OCT approach added clinically relevant structural details, including choroidal thickness and vessel depth, which the ICGA studies could not provide. Our technique appears to advance the in vivo visualization of the full-thickness choroid, successfully reveals the topographical features of choroidal vasculature, and shows potential for further quantitative analysis when compared with other choroidal imaging techniques. This improved visualization of choroidal vasculature and its 3D structure should provide an insight into choroid-related disease mechanisms as well as their responses to treatment.

High Myopia and the Complement System: Factor H in Myopic Maculopathy

High myopia (HM) is both a medical problem and refractive error of the eye owing to excessive eyeball length, which progressively makes eye tissue atrophic, and is one of the main causes for diminishing visual acuity in developed countries. Despite its high prevalence and many genetic and proteomic studies, no molecular pattern exists that explain the degenerative process underlying HM, which predisposes patients to other diseases like glaucoma, cataracts, retinal detachment and chorioretinal atrophy that affect the macular area. To determine the relation between complement Factors H (CFH) and D (CFD) and the maculopathy of patients with degenerative myopia, we studied aqueous humor samples that were collected by aspiration from 122 patients during cataract surgery. Eyes were classified according to eyeball axial length as high myopia (axial length > 26 mm), low myopia (axial length 23.5–25.9 mm) and control (axial length ˂ 23.4 mm). The degree of maculopathy was classified according to fundus oculi findings following IMI’s classification. Subfoveal choroid thickness was measured by optical coherence tomography. CFH and CFD measurements were taken by ELISA. CFH levels were significantly high in the high myopia group vs. the low myopia and control groups (p ˂ 0.05). Significantly high CFH values were found in those eyes with choroid atrophy and neovascularization (p ˂ 0.05). In parallel, the CFH concentration correlated inversely with choroid thickness (R = −0.624). CFD levels did not correlate with maculopathy. All the obtained data seem to suggest that CFH plays a key role in myopic pathology.

The coincidence of two ultra-rare hereditary eye diseases: gyrate atrophy and Kjer optic atrophy - a surprising diagnosis based on next-generation sequencing.

Genetically determined ophthalmic diseases form a numerous and heterogenic group of disorders. Making the accurate clinical diagnosis of genetic eye disease is often a challenge for an ophthalmologist. In many cases, only genetic testing enables the establishment of the proper clinical diagnosis. Here we describe two ultra-rare diseases: gyrate atrophy of the choroid and retina (GACR) and Kjer-type optic atrophy coexisting in a 39-year-old Polish patient with severe visual impairment including a significant reduction of visual acuity and night blindness. Atrophic pigmented changes with large pigment deposits and chorioretinal atrophy with the retina's disturbed structure (with atrophic scarring changes and the epiretinal membrane) of both eyes were observed. Electroretinography (ERG) revealed extinguished responses. A Next-Generation Sequencing (NGS) panel comprising 275 retinal genes revealed a presence of potentially pathogenic variants in two genes: a homozygous variant c.1058G>A (p.Gly353Asp) in the OAT gene and a heterozygous variant c.1886C>G (p.Ser629Ter) in the OPA1 gene. The diagnosis established based on NGS is surprising because initially, several different diagnoses have been made, including high degenerative myopia, choroideremia, Leber congenital amaurosis, and severe, atypical retinitis pigmentosa. This report provides the unquestioned diagnostic value of the combination of chorioretinal imaging and the NGS technique. To our knowledge, this is the first and the only description of the coincidence of gyrate atrophy and Kjer-type optic atrophy.

Portable Diagnostic System for Age-Related Macular Degeneration Screening Using Visual Evoked Potentials.

BackgroundDelayed Dark-Adapted vision Recovery (DAR) is a biomarker for Age-related Macular Degeneration (AMD), however its measurement is burdensome for patients and examiners.MethodsIn this study, we developed a portable, wireless and user-friendly system that employs a headset with a smartphone to deliver controlled photo-bleach and monocular pattern reversal stimuli, while using custom electroencephalography (EEG) electrodes and electronics in order to measure Dark-Adapted Visual Evoked Potentials (DAVEP) objectively and separately at the peripheral and central visual field. This is achieved in one comfortable 20-minute session, without requiring subject reporting. DAVEP responses post photo-bleach for up to 15 minutes were measured concurrently from both eyes in 12 AMD-patients, 1 degenerative myopia patient, and 8 controls who had no diagnosed macular vision loss.ResultsRobust positive polarity DAVEP responses were observed at 200–500 ms from stimulus onset to scotopic stimuli that have been seldom reported and analyzed previously. The amplitude recovery of the DAVEP response was significantly delayed in AMD patients as compared to controls. We developed DAVEP1 scores, a simple metric for DAR, which classified 90% of subject eyes correctly, indicating the presence of AMD in at least one eye of all pre-confirmed subjects with this diagnosis.ConclusionWe developed a user-friendly, portable VEP system and DAVEP1 metric, which show a high potential to identify DAR-deficits in AMD-patients. This novel technology could aid in early diagnosis of AMD.

Development and evaluation of a deep learning model for the detection of multiple fundus diseases based on colour fundus photography

AimTo explore and evaluate an appropriate deep learning system (DLS) for the detection of 12 major fundus diseases using colour fundus photography.MethodsDiagnostic performance of a DLS was tested on the...

Long-term progression of myopic maculopathy in degenerative myopia as imaged by SD-OCT and IR imaging

ABSTRACT Clinical relevance Clinicians can benefit from developing an understanding of the natural disease progression of myopic maculopathy in degenerative myopia using optical coherence tomography (OCT). Background The prevalence of high myopia is constantly increasing. In this work, infrared imaging and OCT is used to study the natural course of the disease. Methods This is a retrospective longitudinal study. Medical records of 72 patients with high myopia (< 6.00 D) and a minimum five-year follow-up period were analysed. Collected data on all enrolled patients included demographic characteristics and medical history, as well as recordings on best-corrected visual acuity, slitlamp examination, OCT, and fluorescein angiography in cases of suspected myopic choroidal neovascularisation. Images were independently marked by two graders. Results The mean age of patients was 54.6 ± 14.4 years (59.72% female) with baseline logMAR best-corrected visual acuity of 0.22 ± 0.28. At baseline examination, 70.83% of the study group showed signs of maculopathy and 62.5% diffuse or patchy atrophy. During follow-up, 22.2% of patients with any type of atrophy showed enlarged affected areas. Two patients with baseline lacquer cracks developed new lesions. There was a weak correlation between patient age and maculopathy progression (r = 0.233; p = 0.03). While central retinal thickness was not associated with maculopathy progression (p = 0.203), a moderate correlation was found between choroidal thickness and maculopathy progression (r = −0.516; p < 0.001). Conclusion Lesion characteristics in myopic degeneration have been elucidated, taking advantage of the ongoing technological advances in retinal imaging. The understanding of disease patterns and progression is essential for appropriate management of patients, while discovering biomarkers which lead to choroidal neovascularisation development is of urgent importance to establish international diagnostic criteria and treatment protocols.

Multiple Evanescent White Dot Syndrome: Findings from a Large Northern California Cohort

To report the clinical and imaging characteristics of multiple evanescent white dot syndrome (MEWDS) from a large single-center cohort. Single-center, retrospective cohort study. A total of 111 patients previously diagnosed with MEWDS in the Kaiser Permanente Northern California system from 2012 to2019. Two retina specialists reviewed the medical records and all available retinal imaging, including Humphrey visual field testing, fundus photography (FP), OCT, fluorescein angiogram (FA), and fundus autofluorescence (FAF). Patients were excluded from analysis if confirmatory imaging was unavailable. Patient characteristics, visual acuity, clinical examination and imaging findings, and final diagnosis. Seventy-three patients (65.8%) were confirmed to have the diagnosis of MEWDS. Fifty-eight (79.5%) were female, with a mean (standard deviation [SD]) age at presentation of 35.2 (14.2) years, and mean refractive error of-1.6 diopters. Initial mean (SD) visual acuity was logarithm of the minimum angle of resolution (logMAR) 0.39 (0.31) and improved to mean (SD) logMAR 0.07 (0.15) at final follow-up. Presenting symptoms included blurred vision (82%), scotomas (56%), photopsias (43%), and floaters (23%). Nine patients (12%) had a previously diagnosed autoimmune condition, and 2 patients (3%) had documentation of a recent vaccination. Antecedent upper respiratory infection was documented in 15 of 66 patients (23%). Noted clinical and imaging features include ellipsoid zone disruption (100%), white fundus lesions (92%), FA hyperfluorescence (92%), foveal granularity (74%), vitreous cell (53%), and optic disc edema (52%). Twenty-nine of the 111 patients (26%) were initially misdiagnosed with MEWDS and subsequently given an alternative diagnosis, including other white dot syndromes, syphilis, primary vitreoretinal lymphoma, myopic degeneration, and central serous chorioretinopathy. Multiple evanescent white dot syndrome is a rare self-limiting condition of the outer retina. Although a distinct set of clinical exam and imaging findings permit recognition of this disease, misdiagnosis is not uncommon.

Retrospective evaluation of indications and birth results of cesarean section due to ophthalmologic diseases

Objectives: To investigate the outcomes of cesarean section due to ophthalmologic indications. Methods: This retrospective clinical study included 40,190 patients underwent cesarean section due to ophthalmological indications between January 2013 – August 2015 in MLP Care Group Hospitals (It includes 32 hospitals). Demographic data, ophthalmologic history and indications and surgical outcomes of caesarean section was assessed.Results: Of the 53 patients with caesarean delivery due to ophthalmologic indications, 32 (60.4%) had high degree myopia, 7 (13.2%) had degenerative myopia, 8 (15.1%) had history of ocular surgery, 2 (3.8%) had history of vitreoretinal surgery due to retinal detachment, 2 (3.8%) had glaucoma with uncontrolled intraocular pressure, 1 (1.9%) had retinitis pigmentosa and 1 (1.9%) had optic neuritis.Conclusions: Ratio of ophthalmic indications is small within all cesarean indications and further longitudinal studies are needed to prevent from unnecessary cesarean section.

QUANTITATIVE TOPOGRAPHIC CURVATURE MAPS OF THE POSTERIOR EYE UTILIZING OPTICAL COHERENCE TOMOGRAPHY.

Deformations of the retina such as staphylomas in myopia or scleral flattening in high intracranial pressure can be challenging to quantify with en face imaging. We describe an optical coherence tomography-based method for the generation of quantitative posterior eye topography maps in normal and pathologic eyes. Using "whole eye" optical coherence tomography, we corrected for subjects' optical distortions to generate spatially accurate posterior eye optical coherence tomography volumes and created local curvature (KM, mm-1) topography maps for each consented subject. We imaged nine subjects, three normal, two with myopic degeneration, and four with papilledema including one that was imaged longitudinally. Normal subjects mean temporal KM was 0.0923 mm-1, nasal KM was 0.0927 mm-1, and KM local variability was 0.0162 mm-1. In myopic degeneration, subjects KM local variability was higher at 0.0836 mm-1. In papilledema subjects nasal KM was flatter compared with temporal KM (0.0709 vs. 0.0885 mm-1). Mean intrasession KM repeatability for all subjects was 0.0036 mm-1. We have developed an optical coherence tomography based method for quantitative posterior eye topography that offers the ability to analyze local curvature with micron scale resolution and offers the potential to help clinicians and researchers characterize subtle, local retinal deformations earlier in patients and follow their development over time.

Ophthalmological Findings in Paediatric Non-Traumatic Coma in Enugu State University Teaching Hospital, Parklane, Enugu, Nigeria

The ophthalmological examination is a vital aspect of the central nervous system examination in comatose children. Several authors have documented different findings with disparities in their recommendations about making ophthalmological examination a routine in the management of the unconscious child. This study sought to evaluate the relevance of routine ophthalmological examination in the management of unconscious children admitted into the paediatric emergency room of Enugu State University Teaching Hospital, Parklane, Enugu, Nigeria. This was a prospective longitudinal study conducted from April 2018 to March 2019. Unconscious patients whose caregivers gave consent were recruited into the study. Traumatic causes of coma were excluded. Demographic features of the patients were obtained. The ophthalmologic examination and diagnoses were made by an ophthalmologist, while the emergency room pediatrician made clinical assessment and diagnoses. Sixteen unconscious children had ophthalmologic examinations done. The Glasgow coma scale scores ranged from 3 to 11, with a mean of 6.6±2.2. Thirteen (81.3%) of the children were classified as severe unconsciousness while the rest were moderate. The degree of unconsciousness was significantly associated with the outcome (?2 =16.0, P = 0.03). A total of six (37.5%) ophthalmologic diagnoses were made, which included cerebral malaria, degenerative myopia, orbital cellulitis, and exposure keratopathy. The presence of an abnormal ophthalmologic finding was not significantly associated with outcome (?2 =0.36, P = 0.55). Routine ophthalmologic examination may not be justified as a management protocol in unconscious children but may be considered in selected cases.