Spectralis sd oct instrument

The Spectralis SD OCT instrument (Heidelberg Engineering, Heidelberg, Germany) was used to obtain 20° × 20° OCT cube scans (49 sections, 1024 A-scans in each B-scan, Automated Real Time 20 frames) centered on the fovea of each eye. Images of each eye, both before and after patching, were taken. During the study period, all scans were performed using the follow-up mode after setting the scans before the dark adaptation period as reference. Images of two subjects were eliminated from the study due to lack of using follow-up mode (Table 1).

A Spectralis^® SD-OCT instrument (Heidelberg Engineering, Heidelberg, Germany) was used to obtain horizontal cross-sectional images that were recorded before and 1 month after the treatment. The central foveal thickness (CFT) was defined as the thickness between the surface of the ILM and the outer border of the retinal pigment epithelium (RPE) centered on the fovea. Six months after the first injection, the ratio of the inner retinal layer thickness at the center of the affected area to the unaffected areas where the modified vessel density rate was measured using OCTA.