NORMAL PERIPHERAL CHOROIDAL THICKNESS MEASURED BY WIDEFIELD OPTICAL COHERENCE TOMOGRAPHY

imagePurpose:

Choroidal stasis plays an important role in the pathogenesis of many conditions and leads to choroidal thickening. However, the normal peripheral choroidal thickness (PCT) pattern remains unknown. This study investigated PCT and associated factors using ultrawidefield optical coherence tomography in healthy eyes.

Methods:

This cross-sectional study included 120 healthy eyes (57 males; age, 52.0 ± 20.5 years). We used choroidal thickness maps created by ultrawidefield optical coherence tomography (viewing angle, 200°) with real-shape correction. The peripheral area was defined from 60° to 100° and further separated vertically and horizontally. The PCT and the correlations between PCT and subjects’ characteristics were examined.

Results:

The PCT were 227.1 ± 57.0 µm, 199.6 ± 53.9 µm, 196.6 ± 57.1 µm, and 148.0 ± 38.2 µm in supratemporal, infratemporal, supranasal, and infranasal areas, respectively. The thickest peripheral sector was most frequently observed in supratemporal (69.2%). The PCT negatively correlated with age in all regions (P-values

INCREASING EVIDENCE FOR THE SAFETY OF FOVEA-INVOLVING HALF-DOSE PHOTODYNAMIC THERAPY FOR CHRONIC CENTRAL SEROUS CHORIORETINOPATHY

imagePurpose:

A retrospective study was performed with data from the prospective randomized controlled trials, PLACE and SPECTRA, assessing the risk of foveal atrophy and the likelihood of structural and functional improvement on optical coherence tomography, after foveal half-dose photodynamic therapy in chronic central serous chorioretinopathy.

Methods:

A total of 57 chronic central serous chorioretinopathy patients received a single half-dose photodynamic therapy with a treatment spot that included the fovea. Optical coherence tomography scans and fundus autofluorescence images were analyzed for structural improvement and possible atrophy development, at baseline and at several visits after treatment. Main outcome measures were integrity of the external limiting membrane and ellipsoid zone on optical coherence tomography and hypoautofluorescence on fundus autofluorescence.

Results:

The subfoveal external limiting membrane was graded as continuous in 21 of 57 of patients (36.8%) at baseline, and the subfoveal ellipsoid zone was graded as continuous in 5 of 57 patients (8.8%) at first visit, which improved to 50 of 51 (98.0%) and 32 out of 51 (62.7%) at the final visit at 2 years, respectively (both P

CHOROIDAL VASCULARITY INDEX IN HYDROXYCHLOROQUINE TOXIC RETINOPATHY: A Quantitative Comparative Analysis Using Enhanced Depth Imaging In Spectral Domain Optical Coherence Tomography

imagePurpose:

To investigate choroidal involvement in eyes of patients treated with hydroxychloroquine (HCQ), by quantifying the choroidal vascularity index (CVI) and other choroidal biomarkers.

Methods:

Vertical enhanced depth imaging spectral domain optical coherence tomography (SD-OCT) scans were performed in eyes with either advanced-stage or mild HCQ toxic retinopathy, as well as in healthy age-matched and sex-matched controls. Based on SD-OCT scans, the subfoveal and mean choroidal thickness (ChT) was measured. The CVI, total choroidal area (TCA), luminal choroidal area (LCA), and stromal choroidal area (SCA) were calculated based on a binarization image process. These variables were computed and compared between the three groups (i.e., advanced stage, mild toxicity, and healthy controls).

Results:

Forty-eight eyes of 47 patients under HCQ (26 eyes presented with advanced stage HCQ toxicity and 22 eyes with mild toxicity) and 34 eyes of 31 healthy controls were included. Both CVI and ChT were significantly different between the three groups (P

CLINICAL AND STRUCTURAL IMPACT OF SUBMACULAR FLUID AFTER PNEUMATIC RETINOPEXY REPAIR FOR RHEGMATOGENOUS RETINAL DETACHMENT

imagePurpose:

To assess the impact of submacular fluid (SMF) after pneumatic retinopexy for primary rhegmatogenous retinal detachment repair.

Methods:

Retrospective review of consecutive patients treated with pneumatic retinopexy for primary rhegmatogenous retinal detachment repair. 387 eyes (374 patients) were included, of which 166 underwent optical coherence tomography imaging after successful pneumatic retinopexy. Foveal-centered optical coherence tomography scans were reviewed.

Results:

SMF occurred in 59 eyes (35.5%) and was associated with macular detachment (P ≤ 0.001) and phakic lens status (P = 0.007). Submacular fluid resolved over an average of 9.39 months and was associated with worse preprocedure best-corrected visual acuity and delayed visual recovery. The mean final best-corrected visual acuity was 0.277 logarithm of the minimum angle of resolution (20/40) in eyes with SMF and 0.162 logarithm of the minimum angle of resolution (20/30) in those without SMF (P