Impact of Coronavirus Disease 2019 on Intravitreal Antivascular Endothelial Growth Factor Injection Rates in Nigerians.

Aim: To quantify the impact of coronavirus disease 2019 (COVID-19) on the rate of intravitreal antivascular endothelial growth factor (VEGF) injections (IVI) in eye hospitals in Nigeria. Materials and Methods: A retrospective, observational, comparative study. The IVIs given 12 months before (pre-COVID) and 12 months after the first announcement of the COVID-19 lockdown (COVID) in Nigeria in four hospitals were used as the sample for this study. All eyes were treatment naïve. We determined the total number of all anti-VEGF injections, the number given for each indication, and the number of each type of the three anti-VEGFs given. A comparison of the presenting vision in IVI eyes between the two eras and the visual outcome of the IVI treatment was made. Data were analyzed using the SPSS version 22 to determine statistical significance. Results: Male/female ratio, pre-COVID 63.4%/36.6% and COVID 58.6%/41.4% (P = 0.123). Age, pre-COVID 61.3 (SD 12.9) 9-95 years and COVID 57.5 (SD 16.4) 0.15-95 years. There was a 15.3% (81 eyes) reduction in the number of eyes between pre-COVID and COVID eras (528 and 447 eyes, respectively). Likewise, the number of IVIs reduced by 26% (221 IVIs) from 850 pre-COVID to 629 COVID, P = 0.005. A comparison of the proportion of eyes in the four clinic locations between the two eras was not statistically significant (P = 0.148). The commonest indication was proliferative diabetic retinopathy in both eras, 208 versus 178 eyes (323 versus 226 IVIs). Bevacizumab, Ranibizumab, and Aflibercept were given in the following proportions 60.2%, 22.3%, and 17.4% (pre-COVID) versus 60.2%, 31.5%, and 8.3% (COVID), P = 0.000. Presenting visual acuity was >6/60 in 67.4% of eyes (pre-COVID) versus 59.4% of eyes (COVID), P = 0.039. Vision improved in 51.3% of eyes (pre-COVID) versus 47.7% (COVID); there was no significant difference in visual outcome comparing both eras, P = 0.972. Conclusion: COVID-19 significantly reduced the number of eyes and IVIs. Eyes had worse presenting visual acuity during the COVID era; however, treatment outcome was comparable between COVID and pre-COVID eras.

Visual outcome of treating proliferative sickle cell retinopathy in 108 eyes.

AIM: To report treatment methods and visual outcome of treating proliferative sickle cell retinopathy (PSCR). DESIGN: Retrospective interventional. METHODS: Review of PSCR eyes treated between 2017 to 2022. Patient demographics, fundus findings at presentation, genotype, PSCR stage, treatment used, and visual outcome were assessed. RESULTS: 108 eyes of 88 consecutive patients were studied. Male: Female 48:40. Mean age: 38.91 (SD:12.52) years. Genotype: sickle cell haemoglobin C (SC) 83 eyes (76.9%), sickle cell haemoglobin S (SS) 19 eyes (17.6%), and sickle cell trait (AS) 6 eyes (5.5%). PSCR stages: 3: 15 eyes (11.0%), 4: 74 eyes (67.0%), and 5: 19 eyes (22.0%). Treatment methods: Intravitreal Injection (IVI) of anti-vascular endothelial growth factor (VEGF) only (27 eyes,25%), scatter retinal laser photocoagulation (SRLP) only (7 eyes, 6.5%), Vitrectomy + SRLP (29 eyes, 26.9%), IVI + SRLP (25 eyes, 23.1%), and Vitrectomy + IVI + SRLP (20 eyes, 18.5%). The treatment used correlated with PSCR stage (p = 0.000). IVI only was mostly used to treat stage 4 (81.4%), and SRLP only was used for stages 3 (42.9%) and 5 (57.1%). IVI + SRLP treated eyes had the best pre- and post-treatment vision. Vitrectomy + SRLP treated eyes had the most improved vision. SRLP only had least visual improvement. Fundus findings correlated with visual outcome (p = 0.003); but stage of PSCR, genotype and treatment used had no correlation (P > 0.05). CONCLUSION: Several options effectively treat PSCR. Visual outcome improved or remained same in 90.7% of treated eyes. Randomized controlled trials will determine the optimum treatment for each distinct presentation of PSCR. Treatment guidelines and a disease classification system of prognostic value are unmet needs.

Prevalence and systemic associations of retinal vascular occlusions in Sub-Saharan Africa.

Background: Retinal vascular occlusions are a common cause of visual impairment. Studies on retinal vascular occlusions in sub-Saharan Africa (SSA) have primarily been retrospective and on retinal vein occlusion (RVO) only. The aim of this study, therefore, was to determine the prevalence and pattern of retinal vascular occlusions and their systemic associations in SSA. Materials and Methods: This was a hospital-based, cross-sectional study involving all new patients presenting at the general ophthalmic and specialty retina clinics in four hospitals in Nigeria over a 1 year period. All the patients underwent a comprehensive eye examination. The demographic and clinical data of patients with retinal vascular occlusions were entered into an excel sheet and analyzed using the Statistical Package for the Social Sciences (SPSS) software version 22.0. Statistical significance was indicated by P < 0.05. Results: A total of 8614 new patients were seen, and a diagnosis of retinal vascular occlusion was made in 90 eyes of 81 patients giving a disease prevalence of 0.9%. Eighty-one eyes of 72 (88.9%) patients had RVO, while 9 eyes of 9 (11.1%) patients had retinal artery occlusion (RAO). The mean age of patients with RVO and RAO was 59.5 years and 52.4 years, respectively. Increasing age, hypertension, and diabetes were the significant associations with retinal vascular occlusion with P < 0.0001. Conclusion: Retinal vascular occlusions are an increasing cause of retinal disease in SSA and tend to occur at an earlier age. They are associated with hypertension, diabetes, and increasing age. Further studies will, however, be required to establish the demographic and clinical profile of patients with RAO in the region.

Résumé Contexte: Les occlusions vasculaires rétiniennes sont une cause fréquente de la déficience visuelle. Les études sur les occlusions vasculaires rétiniennes en Afrique subsaharienne (SSA) ont été principalement rétrospectives et uniquemment sur l'occlusion veineuse rétinienne (RVO). Le but de cette étude était donc de determiner la prévalence et le schéma des occlusions vasculaires rétiniennes et leurs associations systémiques en Afrique subsaharienne. Matériels et méthodes: Il s'agissait d'une étude transversale hospitalière portant sur tous les nouveaux patients se présentant aux cliniques d'ophtalmologie générale et de rétine spécialisée dans quatre hôpitaux au Nigéria sur une période d'un an. Tous les patients ont subi un examen ophtalmologique complet. Les données démographiques et cliniques des patients avec des occlusions vasculaires rétiniennes ont été saisies dans une feuille excel et elles ont été analysées à l'aide du paquet statistique pour les sciences sociales (SPSS) logiciel version 22.0. La signification statistique était indiquée par P < 0,05. Résultats: Au total, 8614 nouveaux patients ont été vus et un diagnostic d'une occlusion vasculaire rétinienne a été réalisée dans 90 yeux de 81 patients donnant une prévalence de la maladie de 0,9 %. Quatre-vingt-un yeux de 72 (88,9 %) patients avaient RVO, tandis que 9 yeux de 9 (11,1%) patients avaient une occlusion de l'artère rétinienne (RAO). L'âge moyen des patients avec RVO et RAO était de 59,5 ans et 52,4 ans, respectivement. L'augmentation de l'âge, l'hypertension et le diabète étaient les associations significatives avec l'occlusion vasculaire rétinienne avec P < 0,0001. Conclusion: Les occlusions vasculaires rétiniennes sont une cause croissante de maladie rétinienne en Afrique subsaharienne et elles ont tendance à survenir à un âge plus précoce. Elles sont associées à l'hypertension, au diabète et à l'âge. D'autres études seront cependant nécessaires pour établir la démographie et le profil clinique des patients atteints de RAO dans la région. Mots-clés: Diabète, hypertension, occlusion artérielle rétinienne, occlusion veineuse rétinienne.

Neuroprotection for Nonarteritic Central Retinal Artery Occlusion: Lessons from Acute Ischemic Stroke.

Nonarteritic central retinal artery occlusion (NA-CRAO) is a variant of acute ischemic stroke (AIS) and is a cause of sudden severe loss of vision. There are guidelines by the American Heart Association and the American Stroke Association for the care of CRAO patients. This review explores the basis of retinal neuroprotection for CRAO and its potential for improving the outcome of NA-CRAO. Recently, there have been significant advances in research into the use of neuroprotection to treat retinal diseases, including retinal detachment, age-related macular degeneration, and inherited retinal diseases. Also, neuroprotective research in AIS has been extensive, and newer drugs tested, including Uric acid, Nerinetide, and Otaplimastat, with promising results. Progress in cerebral neuroprotection after AIS offers hope for retinal neuroprotection after CRAO; and a possibility of extrapolating research findings from AIS into CRAO. Combining neuroprotection and thrombolysis can extend the therapeutic window for NA-CRAO treatment and potentially improve outcomes. Experimented neuroprotection for CRAO includes Angiopoietin (Comp Ang1), KUS 121, Gene therapy (XIAP), and hypothermia. Efforts in the field of neuroprotection for NA-CRAO should focus on better imaging to delineate the penumbra after an acute episode of NA-CRAO (using a combination of high-definition optical coherence angiography and electrophysiology). Also, research should explore details of pathophysiologic mechanisms involved in NA-CRAO, allowing for further neuroprotective intervention, and closing the gap between preclinical and clinical neuroprotection.

Tractional Retinal Detachment: Prevalence and Causes in Nigerians.

Aim: To determine the causes of tractional retinal detachment (TRD) in Nigerians. Materials and Methods: A prospective, multicentre study evaluating eyes diagnosed to have TRD. History, clinical examination (including visual acuity, intraocular pressure measurement, anterior segment examination and dilated fundoscopy) and systemic evaluation (including previous diagnosis of diabetes, hypertension, sickle-cell disease and others) were performed in TRD eyes out of a cohort of retinal detachment eyes. Results: The prevalence of TRD of the 237 patients diagnosed with RD within a one-year study period was 25.7% (61 patients). Eighty eyes were diagnosed with TRD. Thirty-eight eyes of nineteen patients (31%) were bilateral, and 42 (69%) were unilateral. There were 38 male patients (62.3%) and 23 female patients (37.7%). The mean age was 52.3 ± 12.7 years (11-69 years). 88.5% of all TRD patients had an associated systemic disease, diabetes being the most common disease in 88.8% of them. Proliferative diabetic retinopathy was the most common cause of TRD (77.5%) and the most common cause of bilateral TRD. Both trauma and proliferative sickle-cell retinopathy occurred in 3.8% of the eyes. 68.8% of TRD eyes were blind at the presentation. However, the causes of TRD did not show any significant association with blindness (P = 0.819). Conclusion: Proliferative diabetic retinopathy poses a significant threat to vision, being the most common cause of TRD. Early detection and treatment of proliferative retinopathy in diabetes and sickle-cell disease, and trauma prevention will significantly reduce the burden of blindness due to TRD.

Exudative Retinal Detachment in Nigerians: Demographics and Causes.

Background: Exudative retinal detachment (ERD) is a rare type of retinal detachment (RD), and information on its causes and presentation in Nigerians and Black Africans is scarce. Aim: To report the prevalence, vision at presentation, and causes of ERD in a cohort of RD patients. Materials and Methods: A prospective, multicentre, hospital-based study. We examined consecutive eyes diagnosed with ERD in ophthalmic patients seen within 1 year in four ophthalmic hospitals in Nigeria. The patients had a complete eye examination, including visual acuity, intraocular pressure measurement, slit lamp examination of the anterior segment, dilated fundus examination, and other ancillary investigations. Statistical analysis was done using SPSS version 22.0. Results: Nine out of 237 patients were diagnosed with ERD, giving a hospital-based prevalence of 3.8% of RDs. The mean age of patients was 45.8 ± 21.6 years (6 months-80 years), male:female = 2:1. ERD was bilateral in one patient and unilateral in eight patients. There was no gender association (P = 0.84), but systemic disease was associated with a risk of ERD (P = 0.001). Five out of 9 (55.6%) patients had an associated systemic disease. The systemic diseases include two patients (40%) who had chronic renal failure, two patients (40%) who had systemic hypertension, and one patient (10%) who had lung cancer. Other ocular causes of ERD include post endophthalmitis, coats disease, and age-related macular degeneration in one eye each. 80 % of eyes were blind at presentation. Conclusion: ERD is a rare form of RD in Nigerians and is associated with systemic diseases. There are inflammatory, neoplastic, vascular, and degenerative causes of ERD. At presentation, most eyes are blind. Early presentation will be beneficial in salvaging vision. Also, awareness of the occurrence and causes of ERD should be created amongst eye care practitioners.

Clinical presentation and macular morphology in retinitis pigmentosa patients.

Background: Optical coherence tomography (OCT) is a noninvasive, frequently used imaging technology that enables detailed viewing of retina anatomy. It is used to monitor disease progression in retinitis pigmentosa (RP) eyes, including detecting changes in retinal thickness. Purpose: The purpose of the study is to determine the clinical presentation and macular morphology in RP eyes using OCT imaging. Methods: A retrospective review of case records and OCT scans in eyes diagnosed with RP in two ophthalmic clinics in Nigeria. Biodata, Snellen best-corrected visual acuity (BCVA), intraocular pressure (IOP), vertical cup-to-disc ratio (VCDR), and presence of maculopathy were determined. Data were analyzed using IBM SPSS version 22.0 (IBM Corp. Armonk, NY, USA). Results: Fifty-five eyes of 28 patients (18 males and 10 females), with a mean age of 47.16 ± 15.56 years (22-77 years), were studied. 40-49 years was the most frequent age group, 28.6%. Severe visual impairment occurred in 22% of eyes and myopia in 32%. Twenty-nine percent had undergone cataract surgery or had a significant cataract. The mean IOP was 11 mmHg, and the mean VCDR was 0.46. On OCT examination, macular atrophy was the most common finding in 74.5% of eyes, epiretinal membrane in 16.3%, cystoid macular edema in 7.3%, vitreomacular adhesion in 5.4%, and vitreomacular traction in 1.8%. There was no association between macular morphology, macular thickness, and BCVA (P = 0.155, P = 0.424). Conclusion: OCT provides information on macula structure in RP eyes. About 14.5% of eyes had a normal macula, while 85.5% had a maculopathy, confirming that RP eyes have a higher rate of maculopathy than non RP eyes. OCT evaluation of an RP eye should be a standard workup for the early detection of such maculopathy and monitoring for disease progression.

Résumé Contexte: La tomographie par cohérence optique (OCT) est une technologie d'imagerie non invasive fréquemment utilisée qui permet une visualisation détaillée de l'anatomie de la rétine. Elle est utilisée pour surveiller la progression de la maladie dans les yeux de la rétinite pigmentaire (RP), y compris la détection des changements dans l'épaisseur de la rétine. Objectif: Le but de l'étude était de déterminer la présentation clinique et la morphologie maculaire des yeux présentant une RP à l'aide de l'imagerie OCT. Méthodes: Une revue rétrospective des dossiers de cas et des scans OCT dans les yeux diagnostiqués de RP a été réalisée dans deux cliniques ophtalmologiques au Nigeria. Les données biographiques, la meilleure acuité visuelle corrigée de Snellen (MAVC), la pression intraoculaire (PIO), le rapport cup-sur-disc vertical (RCDV) et la présence de maculopathie ont été déterminés. Les données ont été analysées à l'aide d'IBM SPSS version 22.0 (IBM Corp. Armonk, NY, USA). Résultats: Cinquante-cinq yeux de 28 patients (18 hommes et 10 femmes), âgés en moyenne de 47,16 ± 15,56 ans (22­77 ans) ont été étudiés. Les 40 à 49 ans étaient la tranche d'âge la plus fréquente à 28,6 %. Une déficience visuelle sévère est survenue dans 22 % des yeux et une myopie dans 32 %. Vingt-neuf pour cent avaient subi une chirurgie de la cataracte ou avaient une cataracte importante. La PIO moyenne était de 11 mmHg et le RCDV moyen était de 0,46. À l'examen OCT, on retrouvait l'atrophie maculaire prédominante dans 74,5 % des yeux, la membrane épirétinienne (16,3 %), l'œdème maculaire cystoïde (7,3 %), l'adhérence vitréomaculaire (5,4 %) et la traction vitréomaculaire (1,8 %). Il n'y avait aucune association entre la morphologie maculaire, l'épaisseur maculaire et la MAVC (P = 0,155, P = 0,424). Conclusion: l'OCT fournit des informations sur la structure de la macula dans la RP. Environ 14,5% des yeux avaient une macula normale contre 85,5% avec maculopathie, confirmant ainsi que les yeux avec RP ont un taux de maculopathie plus élevé que les yeux sans RP. L'évaluation OCT d'un œil avec RP devrait être un bilan standard pour la détection précoce de maculopathie et la surveillance de la progression de la maladie. Mots-clés: Membrane épirétinienne, dystrophie rétinienne héréditaire, atrophie maculaire, œdème maculaire, tomographie par cohérence optique, rétinite pigmentaire.

Prevalence and systemic associations of retinal vascular occlusions in Sub­Saharan Africa

Background: Retinal vascular occlusions are a common cause of visual impairment. Studies on retinal vascular occlusions in sub Saharan Africa (SSA) have primarily been retrospective and on retinal vein occlusion (RVO) only. The aim of this study, therefore, was to determine the prevalence and pattern of retinal vascular occlusions and their systemic associations in SSA. Materials and Methods: This was a hospital based, cross sectional study involving all new patients presenting at the general ophthalmic and specialty retina clinics in four hospitals in Nigeria over a 1 year period. All the patients underwent a comprehensive eye examination. The demographic and clinical data of patients with retinal vascular occlusions were entered into an excel sheet and analyzed using the Statistical Package for the Social Sciences (SPSS) software version 22.0. Statistical significance was indicated by P < 0.05. Results: A total of 8614 new patients were seen, and a diagnosis of retinal vascular occlusion was made in 90 eyes of 81 patients giving a disease prevalence of 0.9%. Eighty one eyes of 72 (88.9%) patients had RVO, while 9 eyes of 9 (11.1%) patients had retinal artery occlusion (RAO). The mean age of patients with RVO and RAO was 59.5 years and 52.4 years, respectively. Increasing age, hypertension, and diabetes were the significant associations with retinal vascular occlusion with P < 0.0001. Conclusion: Retinal vascular occlusions are an increasing cause of retinal disease in SSA and tend to occur at an earlier age. They are associated with hypertension, diabetes, and increasing age. Further studies will, however, be required to establish the demographic and clinical profile of patients with RAO in the region

Secondary Macular Holes Post Pars Plana Vitrectomy.

Purpose: To report incidence, clinical presentation, and treatment outcome of full-thickness macular hole (FTMHs) diagnosed post pars plana vitrectomy. Methods: We retrospectively reviewed the demographics, best-corrected visual acuity (BCVA), indication for the primary vitrectomy, time to diagnose the secondary FTMH, optical coherence tomographic (OCT) appearance, and treatment outcome of FTMHs, occurring after vitrectomy performed between January 2019 and December 2020. Results: Six of 523 vitrectomized eyes developed FTMHs, an incidence of 1.1%. There were five females and one male, mean age of 56.5 years (range 37-85). The indication for primary vitrectomy was rhegmatogenous retinal detachment (RRD) in three eyes, one eye each for sub internal limiting membrane hemorrhage from a ruptured macroaneurysm, vitreous hemorrhage from polypoidal choroidal vasculopathy (PCV), and pre-insertion of Ahmed glaucoma drainage device (GDD). FTMHs occurred within one week to three months after vitrectomy (time from primary vitrectomy to the identification of the secondary MH was a mean of 1.03 months). Mean BCVA in all six MH eyes was log MAR 0.9 (Snellen: 6/54). Anatomical closure was achieved after one surgery in three eyes, two surgeries in 1 eye, after photodynamic therapy (PDT) in the PCV eye, and one patient declined surgery. The mean BCVA in the four surgically closed MH eyes improved marginally from log MAR 0.82 (Snellen: 6/38) to log MAR 0.72 (Snellen: 6/30), mean follow-up 7.6 months. Conclusion: Post-vitrectomy FTMH is rare, and RRD was the commonest indication for initial vitrectomy. We observed that all secondary MHs were closed successfully using the inverted internal limiting membrane (ILM) flap technique with limited improvement in vision. The visual outcome of these secondary MHs trails behind that of idiopathic MHs.

Burden and Presentation of Age-Related Macular Degeneration among Nigerians.

PURPOSE: Age-related macular degeneration (AMD) is a leading cause of visual impairment worldwide, and its prevalence may also be on the increase in Nigeria. The purpose of this study is to ascertain the burden and pattern of presentation of AMD in a developing country. METHODS: We conducted a multicenter, prospective study from January to December 2018. Biodata and history of systemic disease were obtained from consecutive patients presenting at four collaborating retina clinics and diagnosed with a retina disease after dilated fundus examination and ocular investigations such as fundus photography, fluorescein angiography, and optical coherence tomography. All eyes diagnosed to have wet and dry AMD were used for the study analysis. RESULTS: Out of 8614 patients, 156 eyes of 78 patients were diagnosed with AMD. The hospital-based prevalence for AMD was 0.91%. The mean age at presentation was 67.9 ± 9.2 years, ranging from 44 to 95 years. A majority (75.6%) of patients were between 60 and 79 years, 53.8% were females. Thirty-two eyes (20.5%) had wet AMD, while 124 eyes (79.5%) had dry AMD. Sixty-one eyes (39.1%) had moderate visual impairment (<6/18-6/60); 58 eyes (37.2%) had normal vision (6/18 and better); while 27 eyes (17.3%) were blind, and ten eyes (6.4%) had severe visual impairment. CONCLUSION: AMD contributes to the burden of visual impairment and blindness in the elderly Nigerian. In Nigeria, AMD occurs more in females and most common between the ages of 60 and 79. Dry AMD is four times more common than wet AMD. About 24% of eyes have severe visual impairment or blindness, while about a third each have a moderate visual impairment and normal vision. Increasing awareness of AMD among the at-risk population will be beneficial in achieving early diagnosis and treatment.

Retinopathy of Prematurity in the University of Calabar Teaching Hospital, Calabar, Nigeria: An Early Report of a Screening Service.

Background: Retinopathy of prematurity (ROP) is an important cause of childhood blindness worldwide. This blindness is avoidable through regular screening of preterm infants and prompt intervention for those with the condition. Aims/Objectives: This study aimed to determine the pattern of presentation of ROP and the risk factors for its development among preterm infants in the Neonatal Unit of the University of Calabar Teaching Hospital, Calabar, Nigeria. Design of Study: This study is a prospective, longitudinal study. Settings: The study was carried out in the Special Care Baby Unit, Sick Baby Unit, and Neonatal Clinic of the Department of Paediatrics and Child Health, University of Calabar Teaching Hospital, Calabar, Nigeria. Materials and Methods: All preterm infants whose mothers had given informed consent to participate were enrolled. Ocular examination was performed by a trained ophthalmologist. ROP was staged and documented using the revised version of the International Classification of ROP. Data were entered into a questionnaire and analysed using IBM SPSS version 22. Results: Of the 53 neonates recruited into the study, ROP was detected in 11 (21%) neonates, of which 9 (82%) had stage 1 disease, 2 (18%) had stage 2, and none had stage 3. ROP was more common in females, 7 (63.6%), than their male counterparts 4 (36.4%). ROP was higher among those with gestational age (GA) ≤30 weeks [9 (81.8%)] when compared with those with GA >30 weeks [2 (18.2%)] (P = 0.016). Other risk factors for ROP assessed by this study were found not to be significantly associated with the occurrence of ROP. Conclusion: ROP was present in 21% of the neonates, and the majority had stage 1 disease. This finding emphasizes the need for screening of all preterm neonates for ROP in order to forestall avoidable blindness which could result from this condition.

Profile, Visual Presentation and Burden of Retinal Diseases Seen in Ophthalmic Clinics in Sub-Saharan Africa.

PURPOSE: To determine the burden of retinal diseases and the degree of visual impairment associated with each disease, amongst Nigerians. PATIENTS AND METHODS: This was a hospital-based multicenter, prospective, cross-sectional, non-comparative study conducted from January to December 2018. Data was obtained from consecutive patients with a retinal diagnosis presenting at the general ophthalmic and specialty retina clinics in four hospitals (three public, and one private teaching eye department) in Nigeria. Biodata, visual acuity and refraction, intraocular pressure, findings on dilated retinal examination, diagnosis and systemic diseases were noted. Degree of monocular and bilateral visual loss associated with each diagnosed retinal disease was summarized and p value was calculated using chi-square test. P < 0.05 was considered significant. RESULTS: Eight hundred seventy-six of 8614 patients had a retinal diagnosis; establishing a hospital-based retinal disease prevalence of 9.8%. Male:female ratio was 1.1:1. The mean age of study patients was 49.97 (standard deviation 17.64 years). Mean symptom duration was 21.63 months (standard deviation 41.94). The mean intraocular pressure was 13.87 mmHg. Forty-three different retinal diseases were diagnosed. The most common was retinal complications of diabetes, i.e., diabetic retinopathy (DR) alone, diabetic macular edema (DME) alone and a combination of DR and DME, which accounted for 13.7%, 5.6% and 9.3%, respectively (contributed 28.6% of the entire diagnosis). This was followed by retinal detachment (RD), in 219 eyes (15.4%), dry age-related macular degeneration (AMD) in 124 eyes (8.7%). Nearly half of the eyes were blind or severely visually impaired. Blindness occurred in 34.1% of eyes; severe visual impairment in 8.2% of eyes and 29.7% had normal vision. There were 469 patients who had systemic diseases. The common systemic diseases were hypertension in 169 patients (19.3% of the total number of patients), hypertension and diabetes in 156 patients (18%), and diabetes alone in 98 patients (11.1%). Sickle cell disease was present in 1.5%. CONCLUSION: There is need to invest in infrastructure, local training and development of systems for early detection and treatment of several retinal diseases in sub-Saharan Africa; DR and DME having the largest burden. Collaborative physician care and management of hypertension and diabetes could significantly reduce the burden of DR and DME.