Evaluation of photoreceptors, retinal capillary plexuses, and choriocapillaris in patients with birdshot chorioretinopathy

Purpose: To assess the status of the cone photoreceptors using adaptive optics flood illumination ophthalmoscopy in patients with birdshot chorioretinopathy and to study their relationship with optical coherence tomography (OCT) angiography. Methods: Seventeen patients with birdshot chorioretinopathy were studied using standard automated perimetry, color vision testing, fluorescein angiography, indocyanine green angiography, spectral domain OCT, enhanced depth imaging OCT, and adaptive optics flood illumination ophthalmoscopy (rtx1, Imagine Eyes, Orsay, France) in a 90 × 90-μm area at 1.5° temporal of the fovea and OCT angiography (Spectralis OCT2, Heidelberg Engineering, Heidelberg, Germany). For adaptive optics flood illumination ophthalmoscopy, spectral domain OCT, and OCT angiography, a control group of 12 healthy patients (12 eyes) matched for age, sex, and refractive error was included. Results: After excluding low-quality adaptive optics flood illumination ophthalmoscopy images, 12 eyes (12 patients, 7 women, mean age 53.5 ± 10.8 years) were analyzed. Best-corrected visual acuity was 0.01 ± 0.03 LogMAR (20/25 Snellen equivalent), and foveal threshold at standard automated perimetry was 35.2 ± 3.0. Cone density at 1.5° of the fovea in the birdshot chorioretinopathy group (11,435.25 ± 4,342.9 cells/mm2) was significantly smaller than in the control group (24,594.04 ± 4,764.3 cells/mm2, P
Source: RETINA - Category: Opthalmology Tags: Original Study Source Type: research