Central subfield thickness predicts visual acuity outcomes in plaque-irradiated eyes with choroidal melanoma.

OBJECTIVE: To determine the association between pre-operative central subfield thickness (CST) and post-radiotherapy visual acuity (VA), cystoid macular edema (CME), and intravitreal anti-vascular endothelial growth factor (VEGF) requirement. DESIGN: Single-center retrospective study. PARTICIPANTS: Patients with plaque-irradiated extramacular choroidal melanoma treated between 11/11/2011 and 4/30/2021. Pre-operative CST difference between the affected and unaffected eye was used. Kaplan-Meier analysis and hazard ratios were calculated. RESULTS: Of 85 patients, pre-operative CST was greater in the melanoma-affected eye (vs. fellow eye) by mean of 20.4 µm (median 14.0, range - 60.0-182.0). Greater CST at presentation (vs. fellow eye) was associated with larger tumor diameter (p = 0.02), greater tumor thickness (p < 0.001), and more frequent tumor-related Bruch's membrane rupture (p = 0.006). On univariate analysis of outcome data, greater CST at presentation (vs. fellow eye) was associated with higher 5-year risk (1.09 [1.02-1.17], p = 0.02) of VA 20/200 or worse and increased (1.10 [1.01-1.20], p = 0.03) likelihood for anti-VEGF injections after plaque irradiation. There was no significant association with CME. The association between CST and VA outcome remained significant on multivariate analysis accounting for impact of tumor thickness and radiation dose to optic disc, while tumor distance to fovea was the only significant factor on multivariate analysis for anti-VEGF injections. CONCLUSION: Greater CST at presentation (vs. fellow eye) was associated with worse VA outcome following plaque radiotherapy for choroidal melanoma. Large-sized tumors may contribute to a higher intraocular VEGF burden, potentially leading to greater preoperative CST, which correlates with poor VA outcome post-plaque radiotherapy.

Stroke Risk before and after Central Retinal Artery Occlusion: A Population-based Analysis.

PURPOSE: To determine the risk of stroke, transient ischemic attack (TIA), and transient monocular vision loss (TMVL) before and after a central retinal artery occlusion (CRAO). DESIGN: Population-based, retrospective case series. PARTICIPANTS: Patients diagnosed with a CRAO in Olmsted County, Minnesota, from 1976 to 2016. METHODS: Patients living in Olmsted County with a diagnosis code of CRAO from 1976 to 2016 were reviewed. New CRAOs were confirmed, and stroke, TIA, and TMVL events in the 15 days before and after CRAO were recorded. MAIN OUTCOME MEASURES: Incidence of stroke, TIA, and TMVL events in the 15 days before and after CRAO. RESULTS: Eighty-nine patients with a CRAO were identified, providing an annual incidence of 2.58/100 000 (95% confidence interval [CI], 2.04-3.11). Median age at the time of CRAO was 76 years (range, 46-100 years); 56.2% were male, and 89.9% of the cohort was White. In the 15 days before and after CRAO, there were 2 ischemic strokes (2.2%), 1 hemorrhagic stroke (1.1%), 2 TIAs (2.2%), and 9 TMVL events (10.1%). Starting in 1999, 15 of 45 patients underwent magnetic resonance imaging within 2 months of CRAO. One patient (6.7%) had evidence of asymptomatic diffusion restriction, and 9 patients (60%) had a remote infarct. CONCLUSIONS: This population-based study demonstrated that the risk of symptomatic ischemic stroke is 2.2% in the 15 days before and after a CRAO, which is slightly lower than most studies from tertiary centers. These data should be considered as practice recommendations are developed regarding the urgency of neurovascular workup in patients with acute CRAO.

Conversion Factor for B-Scan Ultrasound Measurement of Intraocular Tumors With and Without the Sclera.

OBJECTIVES: To investigate the relationship between choroidal nevus and melanoma thickness measured with or without the sclera included by B-scan ultrasound and to present a simple conversion formula. METHODS: Medical records were retrospectively reviewed for choroidal nevus or melanoma evaluated at the Mayo Clinic in Rochester, Minnesota, with B-scan ultrasound between February 4, 2004, and April 23, 2020. Charts were retrospectively reviewed for high-quality B-scan images in which the ultrasound transducer was perpendicular to the lesion, measuring the tumor thickness without the sclera included. Measurements were repeated with the sclera included for each patient. Univariate and multiple linear regression analyses were performed to identify factors correlated with scleral thickness. RESULTS: There were 201 tumors included in the study, with a mean patient age ± SD of 61 ± 14 years, largest tumor basal diameter of 11.8 ± 4.8 mm, tumor thickness without the sclera included of 3.72 ± 2.7 mm, and thickness with the sclera included of 4.54 ± SD 2.8 mm. On the univariate analysis, factors associated with perceived scleral thickness by B-scan ultrasound included age (P < .001), tumor thickness (P < .001), and basal diameter (P = .06). On the multivariate analysis, factors associated with perceived scleral thickness included age and tumor thickness (P < .001) for all tumors and for the subset of 141 tumors with a thickness of 2 mm or greater (P < .001). For tumors of 2 mm or greater in thickness, perceived scleral thickness by ultrasound can be estimated by the formula 0.00495(patient age) + 0.02451(tumor thickness without the sclera) + 0.42549. CONCLUSIONS: We present a simple formula for converting between B-scan ultrasound measurements of choroidal nevus and melanoma measuring 2 mm or greater in thickness with and without the sclera included.

Trends in the Clinical Presentation of Uveal Melanoma During the COVID-19 Pandemic.

BACKGROUND AND OBJECTIVE: The objective was to evaluate factors associated with clinical presentation of uveal melanoma (UM) during the initial two years of the coronavirus disease 2019 pandemic. PATIENTS AND METHODS: This was a multi-site, retrospective cohort study of patients treated for uveal melanoma during the first (early) and second (late) year of the pandemic compared with the year prior (control). RESULTS: A total of 48, 67, and 75 patients were in the control, early, and late cohorts, respectively. The early cohort had a higher frequency of large tumors (control: 29.2%, early: 40.3%, late: 29.3%; P < 0.001) at presentation. Both the early and late cohorts had higher rates of enucleation (control: 8.33%, early: 20.9%, late: 18.67%; P ≤ 0.0338) compared to the control cohort. CONCLUSIONS: While there was an increase in large tumors along with a rise in enucleation during the first year of the pandemic, enucleation rates remained elevated even while tumor sizes normalized. [Ophthalmic Surg Lasers Imaging Retina 2024;55:278-284.].

Incidence and clinical characteristics of paediatric keratitis.

BACKGROUND/AIMS: To report the incidence and clinical characteristics of paediatric keratitis diagnosed over a 10-year period in a well-defined population. DESIGN: Retrospective, population-based study. METHODS: Setting: multicentre. POPULATION: patients (<19 years) diagnosed with keratitis as residents of Olmsted County from 1 January 2000, through 31 December 2009. MAIN OUTCOME MEASURES: calculated annual age-specific and gender-specific incidence rates, demographic information and initial and final visual acuity. RESULTS: A total of 294 diagnoses of keratitis occurred in 285 children during the 10-year period, yielding an incidence of 78.0 per 100 000 younger than 19 years (95% CI 69.0 to 87.1) or approximately 1 in 1282 children. The incidence increased throughout the 10-year study period (p<0.001). The mean age at diagnosis was 15.3 years (range, 0.2-18.9) and 172 (60.4%) were women. The observed forms included keratitis due to contact lens wear in 134 (45.6%), infectious keratitis in 72 (24.5%), keratitis not otherwise specified in 65 (22.1%) and keratitis sicca in 23 (7.8%). The visual acuity was reduced to ≤20/40 in 61 (21.4) of the 285 patients at the initial examination and in 24 (8.4%) at the final examination. Children with infectious keratitis had the poorest presenting vision and the best final vision, whereas the reverse was true for those with keratitis sicca. CONCLUSIONS: Keratitis, regardless of aetiology, was observed in approximately 1 in 1300 children by 19 years of age in this population-based cohort. Nearly half were related to contact lens wear and a decrease in vision to ≤ 20/40 occurred in 1 in 12 patients.

Incidence and clinical features of pediatric ocular trauma in a population-based cohort.

PURPOSE: To report the incidence and clinical characteristics of pediatric ocular and adnexal injuries diagnosed over a 10-year period in Olmsted County, Minnesota. METHODS: This multicenter retrospective, population-based cohort study included all patients <19 years of age in Olmsted County diagnosed with ocular or adnexal injuries from January 1, 2000, through December 31, 2009. RESULTS: A total of 740 ocular or adnexal injuries occurred during the study period, yielding an incidence of 203 (95% CI, 189-218) per 100,000 children. Median age at diagnosis was 10.0 years, and 462 (62.4%) were males. Injuries presented to the emergency department or urgent care setting most frequently (69.6%) and often occurred while outdoors (31.6%) during summer months (29.7%). Common injury mechanisms included blunt force (21.5%), foreign bodies (13.8%), and sports activities (13.0%). Isolated anterior segment injuries occurred in 63.5% of injuries. Ninety-nine patients (13.8%) had visual acuity of 20/40 or worse at initial examination, and 55 patients (7.7%) had visual acuity of 20/40 or worse at final examination. Twenty-nine injuries (3.9%) required surgical intervention. Significant risk factors for reduced visual acuity and/or the development of long-term complications include male sex, age ≥12 years, outdoor injuries, sport and firearm/projectile injury mechanism, and hyphema or posterior segment injury (P < 0.05). CONCLUSIONS: Most pediatric eye injuries are minor anterior segment injuries with infrequent long-lasting effects on visual development.

Population-Based Incidence of Ocular Neovascularization Following Central Retinal Artery Occlusion in Olmsted County, Minnesota.

PURPOSE: To determine the population-based incidence of ocular neovascularization (NV) following central retinal artery occlusion (CRAO) and systemic risk factors associated with its development. METHODS: Diagnosis of CRAO between January 1, 1976, and September 9, 2016, was identified using the Rochester Epidemiology Project, a medical records linkage system for all medical care provided to residents of Olmsted County, Minnesota. Records were reviewed to confirm the diagnosis of CRAO, and data were collected on ocular NV and associated systemic diseases. RESULTS: There were 89 patients with CRAO. Subsequent ocular neovascularization developed in 14 (16%) patients. Neovascularization of the iris (NVI) was present in 9/14 (64%) of these patients, neovascularization of the angle (NVA) in 10/14 (71%), neovascularization of the disc (NVD) in 2/14 (14%), and neovascularization elsewhere (NVE) in 1/14 (7%). Of these 14 patients with NV, 9 (64%) developed neovascular glaucoma (NVG). The mean time from CRAO diagnosis to NV was 82 days (range 22 to 268 days). Excluding the patients with proliferative diabetic retinopathy or CRAO caused by CRVO, the mean time to NV diagnosis was 80 days and the shortest time to NV diagnosis was 22 days. Diabetes mellitus was present in 64% of those with NV compared to 23% of those without NV (P = 0.003). CONCLUSION: The population-based incidence of ocular neovascularization following CRAO is 16% and developed within 2 months in half the cohort. Patients with diabetes mellitus are at increased risk for NV complications.