Ocular dominance and its association with retinal thickness profile - A cross-sectional study.

PURPOSE: The retinal thickness profile is essential for detecting ocular diseases like glaucoma and other optic neuropathies. The retinal nerve fiber layer (RNFL) thickness is affected by age, ethnicity, axial length, optic disc area, and inter-eye differences. Ocular dominance has a strong functional correlation with cerebral cortical activity. However, its relationship with RNFL thickness profile is yet to be fully established. METHODS: A cross-sectional study was conducted in 136 healthy adults to study the association between ocular dominance and RNFL parameters measured by Spectral domain optical coherence tomography (SD-OCT) and to study the association of ocular dominance with other parameters such as handedness, intraocular pressure, average axial length, average keratometry, and refractive error. Sighting ocular dominance was detected using the Miles test, and sensory ocular dominance was detected using the fogging test. Visual acuity and refraction assessment were done, and the patients underwent ocular biometry using the Lenstar 900 machine to measure the axial length and keratometry. The RNFL thickness was measured using the Cirrus HD optical coherence tomographer. RESULTS: One hundred and thirty-two (97.06%) individuals were right-handed, four (2.94%) were left-handed, 108 (79.41%) participants were right eye dominant, and 28 (20.59%) were left eye dominant. There was 100% agreement between sighting and sensory ocular dominance. The average RNFL thickness and other measured ocular parameters were comparable in the dominant and nondominant eyes. Regardless of dominance, the left eyes in the study cohort had a greater statistically significant difference in superior RNFL thickness (P < 0.05), which correlated with increased central macular thickness. CONCLUSION: Ocular dominance occurred mostly in the right eye. The RNFL thickness profile is not associated with ocular dominance in emmetropic and mild myopic individuals with normal best corrected visual acuity.

Diagnostic Value of Point-of-Care Ultrasound-Guided Assessment of Relative Afferent Pupillary Defect in Adult Ocular Trauma Patients Presenting to the Emergency Department: A Prospective Cohort Study.

OBJECTIVES: Early diagnosis of relative afferent pupillary defects (RAPDs) in patients with ocular trauma is crucial for timely management and improved outcomes. However, clinical examination can be challenging for patients with periorbital ecchymosis. This study aimed to compare the diagnostic accuracy of point-of-care ultrasound (POCUS) and clinical examination by emergency physicians for detecting RAPD in adult ocular trauma patients and to evaluate the proportion of RAPD in patients with ocular trauma who presented to the ED. METHODS: This prospective cohort study was conducted at an academic emergency department in South India. Adult ocular trauma patients were assessed for RAPD using clinical examinations by emergency physicians and POCUS. The diagnostic accuracies of both methods were compared, with the ophthalmologist's final diagnosis serving as the gold standard. The sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) were calculated for both techniques. RESULTS: A total of 376 patients (median age, 35 years) were included in this study. RAPD was identified in 14.63% of the patients. The sensitivity and specificity of POCUS in detecting RAPD were 92.73% and 99.38%, respectively, which were higher than those of clinical examination, with a sensitivity of 81.82% and specificity of 99.07%. The PPV and NPV of the clinical examination were 93.75% and 96.95%, respectively, whereas the PPV and NPV of POCUS were 96.23% and 98.76%, respectively. POCUS accurately diagnosed RAPD in patients with periorbital ecchymosis. CONCLUSION: POCUS-guided RAPD assessment proves to be a better diagnostic adjunct compared to clinical examination in patients with ocular trauma presenting to the emergency department.

Exudative vascular anomalous complex-like lesion of the peripapillary area.

PURPOSE: Perifoveal exudative vascular anomalous complex is an uncommon retinal lesion of idiopathic origin characteristically described as an isolated, aneurysmal lesion of the perifoveal region. We report an unusual presentation of an exudative vascular anomalous complex-like lesion affecting the peripapillary area. CASE DESCRIPTION: A 69-year-old diabetic woman presented with blurred vision in her left eye for two months. Fundus examination of the left eye showed a small, reddish-orange lesion just supratemporal to the optic disc with perifoveal hard exudates and retinal thickening. Fundus fluorescein angiography demonstrated a peripapillary hyperfluorescent lesion with minimal leakage. Ocular coherence tomography showed an oval structure extending throughout the outer and inner plexiform and nuclear layers with a hyper-reflective wall accompanied by subfoveal and intraretinal fluid suggestive of an eVAC-like lesion in the peripapillary area. Intravitreal anti-vascular endothelial growth factor injection was given, and the lesion persisted even three weeks after the injection. Later, focal laser photocoagulation of the aneurysmal lesion was done. At 6 weeks follow-up, a complete resolution of the aneurysmal lesion with a marked decrease in retinal edema and an improvement of the visual acuity was observed. CONCLUSION: Exudative intraretinal aneurysmal lesions can occur in areas other than perifoveal area. OCT is an useful investigation for knowing their characteristics and the response to treatment. These aneurysmal lesions irrespective of their location can be called by the name eVAC-like or more aptly retinal capillary macro aneurysms (RCM).

Neovascular glaucoma with combined retinal vascular occlusion in carotid cavernous fistula.

Carotid cavernous fistulas (CCFs) can present with varied ophthalmic manifestations. The most important vision-threatening complications of CCF include glaucoma and retinal vascular occlusions. We report a case of a man in his early 30s who developed a post-traumatic direct CCF. The patient denied undergoing embolisation therapy. This resulted in aggravation of his condition with onset of combined retinal venous and artery occlusion leading to neovascular glaucoma and severe vision loss. He was treated with medical management followed by diode laser photocoagulation to control intraocular pressure. Diagnostic cerebral angiography done 3 months later showed complete closure of the fistula; hence, no further intervention was advocated. Combined vascular occlusion is a rare vision-threatening occurrence in cases of CCF. Timely intervention with closure of the fistula can prevent the development of vision-threatening complications.

Spontaneous suprachoroidal haemorrhage in haemophilia coincident with ChAdOx1 nCoV-19 vaccine.

PURPOSE: To report a case of spontaneous suprachoroidal haemorrhage in a haemophilia patient immediately following ChAdOx1 nCoV-19 vaccination. CASE PRESENTATION: A 60-year-old man with haemophilia developed painful vision loss in his left eye a day following the ChAdOx1 nCoV-19 vaccination due to acute angle-closure glaucoma from a massive suprachoroidal haemorrhage. He had an extremely deranged coagulation profile; activated partial thromboplastin time (APTT): 89 s, normal range 29-35 s After factor VIII transfusion, ocular hypotensive therapy and systemic/topical steroids, the suprachoroidal haemorrhage and glaucoma resolved, but the vision remained poor. CONCLUSION: Spontaneous suprachoroidal haemorrhage may be seen in haemophiliacs with deranged coagulation profiles. In our case, it followed ChAdOx1 nCoV-19 vaccination, and we recommend caution and checking the coagulation profile in such patients apriori.

Multifocal Chorioretinitis with Serous Macular Detachment in Diffuse Unilateral Subacute Neuroretinitis (DUSN): Unique Presentation and a Diagnostic Dilemma.

PURPOSE: To report a case of multifocal chorioretinitis with serous macular detachment in diffuse unilateral subacute neuroretinitis (DUSN) and its diagnostic dilemma. DESIGN: Case report. METHOD: A 43-year-old woman presented with painless diminution of vision of right eye for 1 week. Dilated fundoscopy showed mild disc edema, multiple deep grey-white retinitis lesions in posterior pole with mild vitritis. Optical coherence tomography revealed serous macular detachment. Fundus fluorescein angiography was suggestive of active retinitis. Comprehensive workup was unremarkable. Six days later, a live subretinal worm was noticed in inferotemporal retina. A diagnosis of DUSN was made and treated with laser photocoagulation followed by antihelminthic therapy. One month later, patients vision improved and chorioretinal lesions also healed. CONCLUSION: This report presents a unique scenario of serous macular detachment in DUSN in addition to commonly seen multifocal deep retinitis lesions. Prompt treatment with laser, antihelminthic agent can prevent irreversible vision loss.

Exogenous endophthalmitis caused by Enterobacter cloacae following water gun injury.

Enterobacter is a Gram-negative anaerobic bacillus. Enterobacter-associated endophthalmitis is rare. We report Enterobacter cloacae-associated traumatic endophthalmitis following a water gun injury with no visible external entry wound. A 46-year-old man presented with features masquerading as traumatic uveitis in his left eye following injury by water stream from a toy gun. He was started on topical steroids but within 2 days of initial presentation, there was worsening of vision, presence of hypopyon in the anterior chamber and presence of vitreous exudates confirmed on ocular ultrasound B-scan. Endogenous endophthalmitis was ruled out by extensive work-up including sterile urine and blood cultures. Emergency vitrectomy was done along with lensectomy and silicone oil implantation. E. cloacae were isolated from the vitreous sample, which were sensitive to all standard antibiotics tested. Final visual acuity was 20/200. Traumatic endophthalmitis is usually preceded by a penetrating ocular injury in the form of a corneal, limbal or scleral tear with or without choroidal tissue prolapse and vitreous prolapse. A high index of suspicion is, therefore, needed for the diagnosis of endophthalmitis in the absence of corneal injury following water jet trauma to the eye.

Branch retinal artery occlusion as an initial ocular manifestation of severe iron deficiency anemia: A rare case report.

Ocular manifestations of anemia include conjunctival pallor, retinal hemorrhages, cotton wool spots, Roth spots, subhyaloid hemorrhage, venous dilatation, disc edema, and anterior ischemic optic neuropathy (AION). Retinal arterial occlusion is a very rare complication of iron deficiency anemia. We, hereby, report such a rare case of branch retinal artery occlusion (BRAO) occurring as a complication of iron deficiency anemia. A 49-year-old female presented with sudden painless diminution of vision in her right eye (RE) for 2 weeks with visual acuity of 20/120 in the affected eye and 20/20 in the left eye. Fundus examination of RE showed disc pallor, arteriolar attenuation, and retinal whitening at macula. Fluorescein angiography study demonstrated delayed filling of superotemporal branch of retinal artery, suggesting BRAO as the cause of vision loss. Thorough evaluation for underlying etiology revealed severe iron deficiency anemia (hemoglobin 3.9 g/dl). Her blood pressure, blood sugar profile, lipid profile, carotid Doppler, echocardiogram, coagulation profile, and immunological workup were all unremarkable. She was treated with packed cell transfusion and oral iron supplementation, and her vision improved to 20/40 at 1-month follow-up. Retinal vascular occlusions can occur rarely in iron deficiency anemia, and therefore anemia should be considered, while evaluation of vascular occlusion - specially in those with associated conjunctival pallor as in our case.

Rhino-orbito-cerebral Mucormycosis: Etiopathology, Clinical Features, Outcome, and the Factors Associated with Outcome.

PURPOSE: Mucormycosis is a multisystemic, aggressive, and an opportunistic fungal infection. The most common type is rhino-orbito-cerebral mucormycosis (ROCM) accounting for almost 40% of the cases. In this study, we analyzed the etiopathology, clinical features, treatment outcome, and the factors associated with outcome in ROCM. METHODS: Case records of 52 patients of ROCM were analyzed. Clinical parameters, laboratory parameters, imaging findings, treatment regime, and treatment outcome details were retrieved from each case record. The outcome measures were evaluated as treatment success and treatment failure. Univariate and logistic regression analyses were performed to identify factors associated with treatment outcome. RESULTS: On univariate analysis, factors associated with poor treatment outcome were uncontrolled blood sugar, blood urea, diabetic ketoacidosis, duration of ocular symptoms, no perception of light at presentation, ptosis, conjunctival chemosis, relative afferent pupillary defect, two or more sinus involvement, bony erosion of orbital wall, intracranial extension, intraconal invasion, etc. On subsequent logistic regression analysis, factors that maintained significant association with poor treatment outcome were uncontrolled blood sugar (adjusted odds ratio [aOR], 1.17; p = 0.018), no perception of light at presentation (aOR, 10.67; p = .006), ptosis at presentation (aOR, 3.90; p = 0.03), conjunctival chemosis (aOR, 7.11; p = 0.024), relative afferent pupillary defect (aOR, 10.60, p = 0.01), central retinal artery occlusion at presentation (aOR, 3.54; p = 0.021) and two or more sinus involvement (aOR, 4.90; p = 0.009). CONCLUSIONS: The current study identified newer factors in the form of presenting ocular and radiological features as predictors for aggressive systemic disease and poor treatment outcome. Future prospective studies are, however, needed to substantiate these associations.

Ophthalmology practice in COVID-19 pandemic: Performance of rapid antigen test versus real time-reverse transcription polymerase chain reaction in a tertiary eye care institute in South India.

Purpose: To assess the rapid antigen test (RAT) against the gold standard reverse transcription-polymerase chain reaction (RT-PCR) to screen COVID-19 infection in asymptomatic patients undergoing ophthalmic procedures. Methods: This was a retrospective hospital-based study. Point-of-care (PoC) RAT was performed using nasopharyngeal swab, while RT-PCR for SARS-CoV-2 viral RNA was performed using both nasopharyngeal and throat swabs. Results: A total of 629 patients were tested for SARS-CoV-2 by using both RAT and RT-PCR. Only one patient had tested positive for SARS-CoV-2 with both RAT and RT-PCR, while two patients had tested positive with RT-PCR after an initial negative RAT. The positivity rate for RAT was 0.15% (1/629), and that for RT-PCR was 0.47%. Percent agreement or proportion of agreement observed between the two tests was 99.68%, while Cohen's kappa coefficient value was 0.49. The sensitivity of RAT in comparison to RT-PCR was 33.33%, specificity was 100%, positive predictive value was 100%, and negative predictive value was 99.68%. Conclusion: The sensitivity and Cohen's kappa coefficient in our study were low but that can be attributed to the overall low positivity rates with both RAT and RT-PCR. However, percent agreement observed between the two tests was very high. Therefore, we recommend initial screening of all the patients for COVID-19 symptoms followed by RAT before performing any ophthalmic surgical procedure to ensure the safety of the health care professionals as well as the patients.

Comparison of once daily dose of 0.3% nepafenac alone and three times dose of 0.1% nepafenac alone in pain and inflammation control after phacoemulsification.

PURPOSE: To compare the efficacy of a once-daily dose of 0.3% nepafenac and three times daily dose of 0.1% nepafenac in controlling pain and inflammation following phacoemulsification. METHODS: In this prospective randomized control single-blind study. patients who underwent uneventful phacoemulsification were divided into two groups. Group A received 0.1% nepafenac eye drops three times/day for 4 weeks and group B received 0.3% nepafenac eye drops once daily for 4 weeks following phacoemulsification. All the patients received moxifloxacin 0.5% eye drops four times/day for 2 weeks. None of the patients in any group received any form of corticosteroids. RESULTS: The mean age of the patients in group A was 63.55 ± 8.5 years, while in group B, it was 60.05 ± 7.76 years. There was no significant result in the preoperative baseline demographics and intraoperative parameters between both the groups. The results were statistically insignificant in terms of inflammatory markers between both groups on day 1. But, on day 7, group B showed better results in terms of lid edema, conjunctival congestion, and anterior chamber cells. The patients in group B also perceived significantly less pain on day 1 (P = 0.02) and day 7 (P < 0.001). The central macular thickness was also significantly lower in group B at day 30. (: P < .001) and day 90 (P < .001), respectively. CONCLUSION: Once-daily dose of higher concentrated nepafenac (0.3%) is equally effective and shows better results than 0.1% nepafenac for pain and inflammation control.

Clinical profile, visual outcome and root cause analysis of post-operative cluster endophthalmitis due to Burkholderia cepacia complex.

PURPOSE: To present varied clinical presentations, surveillance reports, and final visual outcomes of a rare outbreak of cluster endophthalmitis caused by gram-negative, opportunistic bacilli, Burkholderia cepacia complex (Bcc). METHODS: Details of five patients who developed postoperative cluster endophthalmitis were collected. For each patient, an undiluted vitreous sample was collected during vitreous tap. Bacterial culture from the vitreous sample in each case had grown Bcc. Surveillance investigations for root cause analysis (RCA) were performed in the operating room (OR), admission, and day-care wards to localize the source. RESULTS: Four patients had undergone phacoemulsification surgery, and one patient had undergone penetrating keratoplasty. Each patient received an initial dose of empiric intravitreal ceftazidime and vancomycin. The organism isolated in each case was sensitive to ceftazidime, cotrimoxazole, and meropenem and resistant to other antibiotics. Core vitrectomy was done after 48-60 hours in four patients along with intravitreal imipenem injection. One patient did not provide consent for core vitrectomy and subsequently developed phthisis bulbi. Three patients had subsequent recurrences. Two patients had a final BCVA of 20/60, two had BCVA better than 20/200, while one patient had no perception of light. None of the surveillance samples from the OR complex could isolate Burkholderia. CONCLUSION: Extensive OR surveillance should be done to identify the potential source of infection. However, the source may not be identifiable in few instances like in our case. Longer follow-up is recommended in cases of Bcc endophthalmitis due to the persistent nature of the infection.

Meta-herpetic ulcer following intravitreal bevacizumab.

PURPOSE: To report a case of meta-herpetic ulcer that developed after intravitreal bevacizumab injection. METHODS: A 55-year-old man with type 2 diabetes mellitus and nephropathy received intravitreal injection of bevacizumab in his right eye for proliferative diabetic retinopathy with macular edema. RESULTS: Two days after the injection, the patient presented with severe pain, redness, and photophobia, and decreased visual acuity in the right eye. The cornea showed a paracentral epithelial erosion with heaped margins with subepithelial haze and punctate keratopathy, and high intraocular pressure. He initially responded to topical antiviral and antiglaucoma medications. However, it rapidly progressed to a geographic ulcer on initiation of mild steroid and became resistant to conventional medical management. His nephropathy precluded treatment with full dose of systemic antivirals and antiglaucoma drugs. Subsequently, it healed after a paramedian tarsorrhaphy was performed. CONCLUSION: Herpetic epithelial keratitis following intravitreal bevacizumab is a rare occurence. However, this case is the first report of progression to a meta-herpetic ulcer.