Ocular Hornet Injury: A Case Report on Corneal Microperforation and Endophthalmitis.

The lesser-banded hornet (Vespa affinis indosinensis) is a prevalent species in tropical and subtropical regions of Asia, including Malaysia. Its stings can result in local reactions, severe anaphylactic shock, and even death. We report a rare case of corneal microperforation and endophthalmitis following an ocular hornet injury. A 76-year-old farmer was attacked by hornets and suffered multiple stings, including one to his right eye. He developed right eye pain, redness, and visual impairment. Ocular examination revealed right corneal haziness with a retained stinger. Attempts to remove the retained stinger were unsuccessful, as the stinger broke and stayed deep in the corneal tissue layer. Corneal microperforation occurred at the site of the retained stinger. Subsequently, he developed endophthalmitis despite extensive topical and systemic antibiotics. He also required a scleral patch procedure for sclerokeratouveitis. This report highlights the importance of quick and vigilant management to prevent severe complications and preserve vision after a hornet sting injury. Retained stingers pose unique challenges that require specialized interventions. There is a need for continuous research and awareness in the management of ocular hornet injuries, aiming to establish standardized treatment guidelines and improve patient outcomes.

Long-term intraocular pressure changes in patients with neovascular age-related macular degeneration treated with ranibizumab.

BACKGROUND/AIMS: To investigate the long-term effects of multiple intravitreal injections (IVTs) of ranibizumab (Lucentis) on intraocular pressure (IOP) in patients with neovascular age-related macular degeneration. METHODS: In 320 eyes, IOP measurements were performed at baseline prior to injection and compared with IOP measurements of the last visit. Correlations between mean IOP change and total number of IVTs, visual acuity or patient age were tested. RESULTS: The mean IOP increase was 0.8 ± 3.1 mm Hg (p < 0.0001). Seven eyes showed final IOP values between 22 and 25 mm Hg. The mean follow-up was 22.7 ± 14.1 months. No further correlations between IOP change and number of IVTs, visual acuity or patient age have been found. CONCLUSIONS: This study demonstrated a statistically significant IOP increase in patients treated with repeated injections of ranibizumab. However, IOP increase required no glaucoma treatment during the study. Therefore, repeated injections with ranibizumab can be considered safe with regard to long-term IOP changes in patients without ocular hypertension or glaucoma.

Sphingomonas paucimobilis endophthalmitis postpenetration ocular trauma: A rare case report.

Endophthalmitis is an uncommon purulent inflammation of the intraocular fluids secondary to endogenous or exogenous causes. It is known that posttraumatic endophthalmitis had a notably poor visual outcome, and it poses therapeutic challenges. Therefore, early organism detection would be beneficial in therapeutic management and are able to reduce long-term complications. This case report describes a patient with a rare positive culture-proven Sphingomonas paucimobilis endophthalmitis due to penetrating ocular trauma by a metal brush over the right eye. A 36-year-old man presented with progressively worsening right eye redness and blurring of vision with pain for 3 days following ocular penetration by a metal brush during grinding. On initial presentation, his visual acuity was 6/12 over the right eye and 6/6 over the left eye. His visual acuity deteriorated to hand movement 5 days later with worsening of ocular infection over the right eye despite topical and oral antibiotics. B-scan revealed dense vitreous infiltration. A vitreous tap was done, and a combination of intravitreal vancomycin and ceftazidime was administered. Vitreous culture isolated Gram negative S. paucimobilis. The patient was planned for early vitrectomy; however, the patient opted for conservative treatment. Therefore, the patient received intravitreal vancomycin and intravitreal ceftazidime injections every 48-72 h. Published articles on S. paucimobilis endophthalmitis postocular penetration are extremely limited. This case report may provide a better understanding of the presentation and is able to aid with early diagnosis and treatment initiation for future reference.

Retinal Vasculature Fractal Dimension Measures Vessel Density.

PURPOSE: The goal of this study was to provide the empirical evidence of fractal dimension as an indirect measure of retinal vasculature density. MATERIALS AND METHODS: Two hundred retinal samples of right eye [57.0% females (n = 114) and 43.0% males (n = 86)] were selected from baseline visit. A custom-written software was used for vessel segmentation. Vessel segmentation is the process of transforming two-dimensional color images into binary images (i.e. black and white pixels). The circular area of approximately 2.6 optic disc radii surrounding the center of optic disc was cropped. The non-vessels fragments were removed. FracLac was used to measure the fractal dimension and vessel density of retinal vessels. RESULTS: This study suggested that 14.1% of the region of interest (i.e. approximately 2.6 optic disk radii) comprised retinal vessel structure. Using correlation analysis, vessel density measurement and fractal dimension estimation are linearly and strongly correlated (R = 0.942, R(2) = 0.89, p < 0.001). Polynomial regression model suggests quadratic regression as the best fit for our data (linear: R(2) = 0.1024, 198 d.f., p < 0.001, quadratic: R(2) = 0.1236, 197 d.f., p < 0.001, cubic: R(2) = 0.1236, 196 d.f., p < 0.001). CONCLUSIONS: This study demonstrated the ability of vessel density measurement to detect the changes in the morphology of retinal microvascular associated with increasing age. Thus, vessel density can be suggested to be another parameter in the quantification of retinal microvasculature.