Nevin Manimala

Indian J Ophthalmol. 2022 Dec;70(12):4343-4348. doi: 10.4103/ijo.IJO_1229_22.

ABSTRACT

PURPOSE: The present study aimed to assess the changes in optic disc and peripapillary retinal nerve fiber layer (RNFL) parameters in myopic patients and its correlation with axial length (AL) and spherical equivalent (SE) using optical coherence tomography (OCT).

METHODS: This was a cross-sectional study carried out from August 2019 to September 2021 in the ophthalmology department of a tertiary care hospital in eastern India. Myopic patients in the age group of 20-40 years and SE between – 0.5 to – 10 Diopters (D) were included in the study. Patients were divided into two groups on the basis of degree of myopia and AL. Appropriate statistical analysis was done at the end of the study period.

RESULTS: The study included 307 eyes of 307 myopic patients. There were 181 females (58.96%) and 126 males (41.04%). The mean age of the patients enrolled for the study was 28.78 ± 5.76 years. Statistically significant difference (P < 0.001) was found between SE and AL in between the subgroups of A and B. With every 1 D increase in SE, the average peripapillary RNFL thickness decreased by 0.61 μ while with every 1 mm increase in AL, the average peripapillary RNFL thickness was found to reduce by 1.03 μ.

CONCLUSION: Analysis of optic nerve head parameters and RNFL thickness by OCT for the diagnosis should be compared with a normative control group that has been matched for refractive error and AL instead of comparison with a normative database that has only been age matched.

PMID:36453342 | DOI:10.4103/ijo.IJO_1229_22

Indian J Ophthalmol. 2022 Dec;70(12):4337-4342. doi: 10.4103/ijo.IJO_754_22.

ABSTRACT

PURPOSE: To determine the retinal nerve fiber layer (RNFL) thickness and ganglion cell complex (GCC) thickness in patients having relative afferent pupillary defect (RAPD) measured by optical coherence tomography (OCT).

METHODS: This cross-sectional study was conducted on 30 patients with posterior segment disease and glaucoma presenting with RAPD. The control group comprised 30 patients with the aforementioned diseases without RAPD. RAPD was graded using neutral density filters placed over the unaffected eye. Peripapillary RNFL thickness and macular GCC were measured using the Cirrus HD-OCT machine.

RESULTS: There were 45 males and 15 females. There was a statistically significant (P < 0.05) difference in the mean of average RNFL thickness in patients having RAPD (64.73 ± 15.16 μm in the affected eyes) as compared to sick control (82.73 ± 11.33 μm in the affected eyes). It was further observed that there was a decrease in RNFL thickness with advancing grades of RAPD. There was a statistically significant (P < 0.05) difference in the mean of average GCC thickness in patients having RAPD (51.57 ± 14.96 μm in the affected eyes) as compared to sick control (76.36 ± 8.06 μm in the affected eyes).

CONCLUSION: Our study suggests that there is a significant reduction in RNFL thickness and GCC thickness in RAPD patients as compared to the sick control group.

PMID:36453341 | DOI:10.4103/ijo.IJO_754_22

Indian J Ophthalmol. 2022 Dec;70(12):4331-4336. doi: 10.4103/ijo.IJO_1114_22.

ABSTRACT

PURPOSE: To evaluate the central macular thickness (CMT) and subfoveal choroidal thickness (SFCT) changes on spectral domain optical coherence tomography (SD-OCT) after cataract surgery with intraocular lens (IOL) implantation in a pediatric population.

METHODS: This was a longitudinal, prospective, interventional study which included 90 pediatric patients who underwent cataract extraction with IOL implantation. Serial SD-OCT scans were done at postoperative day 1, 1-month, and 3-month follow-up. CMT and SFCT were measured at each visit.

RESULTS: A statistically significant increase in CMT was noted at 1 month (from 199.3 μm to 210.04 μm) post surgery, which declined over a 3-month period (202.70 μm, P = 0.0001). In case of SFCT, a constant increase was observed for over 3 months of follow-up (baseline: 296.52 μm; 1 month: 309.04 μm; and 3 months: 319.03 μm, P = 0.0001). The traumatic cataract group showed more pronounced changes in CMT and SFCT than the non-traumatic cataract group. No significant difference was observed regarding these parameters between those who underwent primary posterior capsulotomy (PPC) versus those who did not. None of the patients in the study group developed cystoid macular edema. These posterior segment-related anatomical changes did not affect the final visual outcomes.

CONCLUSION: Cataract surgery induces potential inflammatory changes in the macula and choroid in pediatric patients. Such changes are more pronounced in trauma-related cases; however, they are not significant enough to affect the visual outcomes. Similarly, the additional surgical step of PPC does not induce significant anatomical or functional changes.

PMID:36453340 | DOI:10.4103/ijo.IJO_1114_22

Indian J Ophthalmol. 2022 Dec;70(12):4295-4299. doi: 10.4103/ijo.IJO_1307_22.

ABSTRACT

PURPOSE: This study was conducted to evaluate the accuracy of intraoperative aberrometry (IA) in intraocular lens (IOL) power calculation and compare it with conventional IOL formulas.

METHODS: This was a prospective case series. Eyes with visually significant cataract and axial hyperopia (AL <22.0 mm) underwent IA-assisted phacoemulsification with posterior chamber IOL (Alcon AcrySof IQ). Postoperative spherical equivalent (SE) was compared with predicted SE to calculate the outcomes with different formulas (SRK/T, Hoffer Q, Haigis, Holladay 2, Barrett Universal Ⅱ and Hill-RBF). Accuracy of intraoperative aberrometer was compared with other formulas in terms of mean absolute prediction error (MAE), percentage of patients within 0.5 D and 1 D of their target, and percentage of patients going into hyperopic shift.

RESULTS: Sixty-five eyes (57 patients) were included. In terms of MAE, both Hoffer Q (MAE = 0.30) and IA (MAE = 0.32) were significantly better than Haigis, SRK/T, and Barrett Universal Ⅱ (P < 0.05). Outcomes within ±0.5 D of the target were maximum with Hoffer Q (80%), superior to IA (Hoffer Q > IA > Holladay 2 > Hill-RBF > Haigis > SRK/T > Barrett Universal Ⅱ). Hoffer Q resulted in minimum hyperopic shift (30.76%) followed by Hill-RBF (38.46%), Holladay 2 (38.46%), Haigis (43.07%), and then IA (46.15%), SRK/T (50.76%) and Barrett Universal Ⅱ (53.84%).

CONCLUSION: IA was more effective (statistically significant) in predicting IOL power than Haigis, SRK/T, and Barrett Universal Ⅱ although it was equivalent to Hoffer Q. Hoffer Q was superior to all formulas in terms of percentage of patients within 0.5 D of their target refractions and percentage of patients going into hyperopic shift.

PMID:36453332 | DOI:10.4103/ijo.IJO_1307_22

Indian J Ophthalmol. 2022 Dec;70(12):4251-4256. doi: 10.4103/ijo.IJO_1309_22.

ABSTRACT

PURPOSE: To investigate the impact of different-thickness scleral lenses (SLs) on corneal thickness, curvature, and fluid reservoir thickness in keratoconic eyes.

METHODS: Schiempflug imaging and AS-OCT was captured before and immediately following 6 h of SL wear. Different-thickness lenses were used while keeping the other parameters the same. The timing of the measurement for day 1 and day 2 was matched to allow for the control of the confounding influence of diurnal variation.

RESULTS: Immediately after 6 h of lens wear, no statistically significant difference (P > 0.05) was noted in corneal edema in any region and quadrants between thin- and thick-lens wearers. The calculated percentage of corneal edema was also within the range of overnight closed eye physiological swelling. Pentacam measured higher central corneal thickness compared to AS-OCT in both baselines and after 6 h of lens wear. The current investigation reported minimal but not statistically significant (P > 0.05) flattening in anterior and steepening in posterior curvature parameters in both thin and thick SLs. The mean reduction in the fluid reservoir thickness was 80.00 ± 3.99 and 79.36 ± 3.84 microns after 6 h of thin- and thick-lens wear, respectively, which was not statistically significant (P > 0.05). A statistically significant positive correlation (r = 0.67, P = 0.02) was found between lens thickness and change in anterior steep k with thick-lens wear.

CONCLUSION: Central lens thickness of 200-400 μm did not cause any significant change in corneal curvature and fluid reservoir thickness and did not induce clinically significant corneal edema after short-term SL wear.

PMID:36453326 | DOI:10.4103/ijo.IJO_1309_22

Indian J Ophthalmol. 2022 Dec;70(12):4245-4250. doi: 10.4103/ijo.IJO_1530_22.

ABSTRACT

PURPOSE: To assess vision-related quality of life (VrQoL) in cases with visual loss after ocular trauma (OT) or non-traumatic ocular disease (NTOD) using the National Eye Institute’s 25-Item Visual Function Questionnaire 25 (VFQ-25) and its association with visual disability % (VD%) based on the Rights of Persons with Disabilities (RPwD) Act, 2016.

METHODS: This was a prospective observational study conducted among cases with ocular morbidity in either or both eyes with a visual acuity of ≤6/24. VFQ-25 questionnaire was administered to measure QoL scores. Statistical analysis was done using the Statistical Package for the Social Sciences (SPSS) version 23. P < 0.05 was taken as significant.

RESULTS: Eighty-eight respondents completed the questionnaire. Mean age of participants was 40.272 ± 9.35 years (range: 23-55 years). Forty-three (48.9%) and 45 (51.1%) participants had OT and NTOD, respectively. The most common cause was traumatic optic neuropathy (21.6%) followed by corneal causes (19.4%). Low visual QoL scores were reported in all the cases (57.52 ± 16.08). Between OT and NTOD, a significant difference in terms of age (P = 0.001) and general vision (P = 0.03) was seen. Lowest scores were for driving. Based on VD%, 77 cases had ≤40 and the rest had >40% VD with a significant difference in overall mean scores (P = 0.03), specifically in domains of general vision (P = 0.00), near activities (P = 0.00), and driving (P = 0.007). QoL was decreased in each subscale of ≤40%VD group, who faced the same predicament everywhere as by the cases with more disability.

CONCLUSION: Ocular morbidity is associated with low QoL, predominantly in domains like general vision, near activities and driving. The RPwD Act leaves out a huge population with VD without any government benefits. One might need to consider other vision-related factors also to provide them with social, psychological, and employment benefits.

PMID:36453325 | DOI:10.4103/ijo.IJO_1530_22

Indian J Ophthalmol. 2022 Dec;70(12):4201-4205. doi: 10.4103/ijo.IJO_1204_22.

ABSTRACT

PURPOSE: This study was conducted to assess the outcomes of bleb needling for the treatment of failure of filtration surgeries in primary glaucoma with a follow-up of six months.

METHODS: This prospective interventional study included patients with primary glaucoma who underwent trabeculectomy or combined glaucoma and cataract surgery with failed or failing bleb after six weeks of surgery and less than two years. A comprehensive examination including best-corrected visual acuity (BCVA), intraocular pressure (IOP) measurement, gonioscopy, slit-lamp examination, and bleb morphology grading was done. Selected patients underwent a subconjunctival bleb needling with mitomycin C (MMC) (dose 0.2 mg/ml). Postoperatively, patients were followed up on the first, third, and sixth months and were assessed with respect to IOP, need for antiglaucoma medication (AGM), and complications.

RESULTS: Sixty eyes of 59 patients were included. Preoperatively, 33.3% of patients were on one AGM, whereas postoperatively at the third month 51.7% and at the sixth month 50% of patients were on no AGM. There was a statistically significant decrease in IOP (P < 0.001) from preoperative (mean: 23.8 ± 7.86 mmHg) to postoperative first month (mean: 19.8 ± 9.08 mmHg), third month (mean: 17.4 ± 5.4 mmHg) and sixth month (mean 16.6 ± 4.39). According to the defined criteria in the current study, we achieved 22 (37.9%) successes, 31 qualified successes (53.4%), and 5 (8.6%) failures. Univariate regression analysis showed a higher failure rate among younger age groups. Gender, laterality, and intraoperative complications were not significant statistically.

CONCLUSION: Bleb needling is a safe and effective procedure for the treatment of failed filtration surgeries.

PMID:36453314 | DOI:10.4103/ijo.IJO_1204_22

Indian J Ophthalmol. 2022 Dec;70(12):4138-4143. doi: 10.4103/ijo.IJO_597_22.

ABSTRACT

PURPOSE: To determine if high myopia and glaucoma can be differentiated based on the measurement of superficial vascular density in the peripapillary and macular areas by using Optical Coherence Tomography Angiography (OCTA).

METHODS: This prospective, observational, cross-sectional, comparative study was conducted on patients between 40 and 60 years of age diagnosed as primary open-angle glaucoma (POAG) or high myopia and compared with age-matched controls. The main outcome measures were the difference in SVD% in peripapillary and macular areas in POAG and high myopic eyes. Detailed ophthalmic examination and OCTA of the disc and peripapillary area and macula were performed. The SVD in each zone was calculated using ImageJ software and their difference were analyzed.

RESULTS: In total, 128 eyes of 70 patients were enrolled. Peripapillary SVD% in controls was 45.07 ± 3.44, 40.36 ± 8.27 in high myopia, and 31.80 ± 9.008 in POAG. The mean difference in peripapillary SVD% of POAG to control was – 13.479, of POAG to high myopia was -8.777 (both P < 0.001), and of high myopia to controls was -4.701 (P = 0.012). Macular SVD% in controls was 27.30 ± 3.438, 22.33 ± 6.011 in high myopia, and 21.21 ± 5.598 in POAG. The mean difference in macular SVD% of POAG to controls was -6.088, of high myopia to controls was -4.965 (both P < 0.001), and of POAG to high myopia was -1.122 (P = 0.984; not statistically significant).

CONCLUSION: OCTA is a useful diagnostic tool in distinguishing glaucomatous and myopic eyes. The measurement of peripapillary SVD has a greater discriminatory ability than that of the macular area.

PMID:36453301 | DOI:10.4103/ijo.IJO_597_22

Arterioscler Thromb Vasc Biol. 2022 Dec 1. doi: 10.1161/ATVBAHA.122.318086. Online ahead of print.

ABSTRACT

BACKGROUND: Bilirubin may prevent lipid peroxidation and have important antiatherosclerotic effects. We determined associations of serum bilirubin and lipid with peripheral atherosclerosis.

METHODS: We included 4290 participants (35% men; median age, 60 years) from the southeast China who underwent B-mode ultrasound examination. Increased intima-media thickness or a focal structure encroaching into the arterial lumen by at least 0.5 mm or >50% of the surrounding intima-media thickness value was regarded as having atherosclerosis. Fasting serum bilirubin and lipid levels were measured. Cholesterol/(HDL [high-density lipoprotein] cholesterol+bilirubin), and LDL (low-density lipoprotein cholesterol)/(HDL+bilirubin) ratios were calculated. Unconditional and multinomial logistic regression models were used to examine associations of bilirubin or lipid with prevalence of peripheral atherosclerosis. Mediation analyses were performed to assess the effect of bilirubin on atherosclerosis risk mediated via lipid.

RESULTS: Compared with participants with the lowest levels of bilirubin, those with the highest tertile were less likely to have carotid or femoral atherosclerosis (odds ratios were 0.55-0.74). The highest levels of bilirubin significantly reduced the odds of concurrent carotid and femoral atherosclerosis by 35% to 45%. Participants with the highest levels of cholesterol, LDL, cholesterol/(HDL+bilirubin), and LDL/(HDL+bilirubin) ratios had 2.8- to 3.7-fold increased odds of concurrent carotid and femoral atherosclerosis. LDL accounted for 25.65% of the total bilirubin-atherosclerosis association. LDL and cholesterol mediated the associations between direct bilirubin and atherosclerosis (proportion: 20.40%, 9.67%, respectively).

CONCLUSIONS: Increased serum bilirubin levels are inversely associated with the prevalence of carotid or femoral atherosclerosis. LDL and cholesterol may mediate these associations.

PMID:36453272 | DOI:10.1161/ATVBAHA.122.318086

Stroke. 2022 Dec 1. doi: 10.1161/STROKEAHA.122.040671. Online ahead of print.

ABSTRACT

BACKGROUND: There are limited data regarding the prevalence of distinct clinical, neuroimaging and genetic markers among patients diagnosed with cerebral amyloid angiopathy-related inflammation (CAA-ri). We sought to determine the prevalence of clinical, radiological, genetic and cerebrospinal fluid biomarker findings in patients with CAA-ri.

METHODS: A systematic review and meta-analysis of published studies including patients with CAA-ri was conducted to determine the prevalence of clinical, neuroimaging, genetic and cerebrospinal fluid biomarker findings. Subgroup analyses were performed based on (1) prospective or retrospective study design and (2) CAA-ri diagnosis with or without available biopsy. We pooled the prevalence rates using random-effects models and assessed the heterogeneity using Cochran-Q and I²-statistics.

RESULTS: We identified 4 prospective and 17 retrospective cohort studies comprising 378 patients with CAA-ri (mean age, 71.5 years; women, 52%). The pooled prevalence rates were as follows: cognitive decline at presentation 70% ([95% CI, 54%-84%]; I²=82%), focal neurological deficits 55% ([95% CI, 40%-70%]; I²=82%), encephalopathy 54% ([95% CI, 39%-68%]; I²=43%), seizures 37% ([95% CI, 27%-49%]; I²=65%), headache 31% ([95% CI, 22%-42%]; I²=58%), T2/fluid-attenuated inversion recovery-hyperintense white matter lesions 98% ([95% CI, 93%-100%]; I²=44%), lobar cerebral microbleeds 96% ([95% CI, 92%-99%]; I²=25%), gadolinium enhancing lesions 54% ([95% CI, 42%-66%]; I²=62%), cortical superficial siderosis 51% ([95% CI, 34%-68%]; I²=77%) and lobar macrohemorrhage 40% ([95% CI, 11%-73%]; I²=88%). The prevalence rate of the ApoE (Apolipoprotein E) ε4/ε4 genotype was 34% ([95% CI, 17%-53%]; I²=76%). Subgroup analyses demonstrated no differences in these prevalence rates based on study design and diagnostic strategy.

CONCLUSIONS: Cognitive decline was the most common clinical feature. Hyperintense T2/fluid-attenuated inversion recovery white matter lesions and lobar cerebral microbleeds were by far the most prevalent neuroimaging findings. Thirty-four percent of patients with CAA-ri have homozygous ApoE ε4/ε4 genotype and scarce data exist regarding the cerebrospinal fluid biomarkers and its significance in these patients.

PMID:36453271 | DOI:10.1161/STROKEAHA.122.040671