RETINA

No abstract available

Purpose:

To investigate the impact of penetration and image analysis in different optical coherence tomography (OCT) instruments on the measurement of choroidal vascularity parameters.

Methods:

Twenty-three healthy volunteers were imaged using two swept-source OCTs and one spectral-domain OCT. A fully automatic segmentation method based on ResNet-UNet and Niblack local threshold binarization was performed to quantify the relevant choroidal vascular parameters, including choroidal vascularity index, total choroidal volume, and luminal volume. The intraclass correlation coefficient (ICC) and coefficient of repeatability (COR) were used to analyze the repeatability and consistency of automatic and manual segmentation, respectively.

Results:

Both swept-source OCT devices showed good consistency of luminal volume and total choroidal volume measurements (all ICC value >0.98 with COR% 40%), which was greatly improved after using the automatic algorithm (ICC value >0.99 with COR% 0.85), whereas the choroidal vascularity index measurement from the spectral-domain OCT was larger than the other two swept-source OCT devices (ICC value

Purpose:

To evaluate the retinal circulation in patients with active acute leukemia, to correlate the perfusion metrics with systemic laboratory values, and to assess the vascular perfusion after leukemia remission.

Methods:

Longitudinal stu…

Background:

Retinal detachment is a severe complication of acute retinal necrosis, threatening vision. The published articles on the effectiveness of laser in preventing retinal detachment in acute retinal necrosis are controversial. Therefore, we aim to evaluate whether prophylactic laser is effective for retinal detachment after acute retinal necrosis.

Methods:

PubMed, Embase, and Cochrane databases were searched, and the retrieved records were screened. Each included study has well-defined laser-treated group and control group without laser treatment or with enough data for manual grouping. The quality of the included studies was assessed using ROBINS-I (“Risk Of Bias In Nonrandomized Studies—of Interventions”). Meta-analysis was conducted to calculate the pooled odds ratios and their 95% confidence interval. Sensitivity analysis was used to test the solidarity, and subgroup analysis was performed to determine the source of heterogeneity.

Results:

Fourteen studies with a total of 532 eyes were eventually included. The quality of the included studies was moderate. The combined results showed that the pooled odds ratio was 0.61 (95% confidence interval [0.41∼0.90], P

Purpose:

To evaluate the outcomes of surgical treatment of refractory vasoproliferative retinal tumors (VPTs) and its complications.

Methods:

Clinical charts of all patients diagnosed with VPTs who underwent surgical treatment from 2005 to 2020 were reviewed. Clinical features, surgical techniques, and outcomes were evaluated.

Results:

From 25 eyes of 23 patients with VPTs, 17 (68%) eyes underwent surgical intervention to treat tumor activity and associated complications including epiretinal membrane (n = 10, 59%), retinal detachment (n = 8, 47%), and vitreous hemorrhage (n = 3, 18%). All eyes underwent pars plana vitrectomy with endolaser/cryotherapy to control tumor activity and to treat associated complications. Three cases required tumor resection. At the end of follow-up (mean 55.4 months, range 2–305 months), no eye presented tumor activity or retinal detachment after one or two surgeries. There was no epiretinal membrane recurrence. The mean baseline best-corrected visual acuity was 1.2 ± 0.7 logMAR, and the mean final best-corrected visual acuity was 0.7 ± 0.6 logMAR (P

Purpose:

To evaluate the caliber of the choroidal veins in central serous chorioretinopathy, a disease proposed to be associated with overloading of choroidal venous outflow.

Methods:

Widefield indocyanine green angiograms of eyes with central serous chorioretinopathy were graded for sausaging defined as three or more contiguous fusiform dilations that vary by at least 50% from the narrowest to largest diameters. A bulbosity was defined as a focal 2X dilation of a blood vessel as compared with the diameter of the surrounding host vessel. The data underwent statistical analysis including the use of generalized estimating equations.

Results:

There were 73 eyes of 41 patients with a mean age of 53.5 years. Sausaging of vessels was seen in a mean and median of three quadrants per eye. Using generalized estimating equations, the only significant risk factor for sausaging was the use of corticosteroids. The two significant predictors of subfoveal choroidal thickness using generalized estimating equations were age (P = 0.021) and proportion of quadrants involved by sausaging (P

Propose:

A screening protocol for cytomegalovirus retinitis (CMVR) by fundus photography was generated, and the diagnostic accuracy of machine learning technology for CMVR screening in HIV patients was investigated.

Methods:

One hundred sixt…

Purpose:

To examine 1-year outcomes of metamorphopsia and tangential retinal displacement after epiretinal membrane surgery and identify predictors for metamorphopsia score at 1 year and its improvement from baseline.

Methods:

M-CHARTS were used to measure metamorphopsia. Distances between the intersections of two sets of retinal vessels were measured with infrared or autofluorescence images. Predictors for metamorphopsia scores at 1 year after surgery and their differences from baseline were identified with multivariate regression analysis.

Results:

Ninety-two eyes of 90 consecutive patients were included. The vertical and horizontal distances continued expanding for 1 year (P

Purpose:

To assess changes in choroidal thickness and blood flow in active Vogt–Koyanagi–Harada syndrome and after remission using optical coherence tomography angiography.

Methods:

This was a prospective study of patients with active early uveitis secondary to Vogt–Koyanagi–Harada syndrome. They underwent optical coherence tomography angiography imaging twice: at baseline and after remission on treatment. 3- × 3- and 6- × 6-mm choriocapillaris slabs were used to evaluate parafoveal adjusted flow index as a marker for choroidal blood flow. Mean choroidal thickness of 3 points (subfoveally and 2 points 300 µm parafoveally) was also measured.

Results:

Thirty-nine eyes of 25 patients were initially recruited. After excluding eyes with media opacity, submacular fibrosis, and choroidal neovascularization, 23 eyes of 14 patients were included. The mean follow-up period was 8.7 ± 2.5 months. Mean choroidal thickness in activity and remission was 581.65 ± 108.29 µm and 318.34 ± 72.85 µm respectively (P

No abstract available