Fig. 4

Surgical case 1. Images showing a retinal detachment from the giant retinal tear extending from IX to II of the fundus. b Nine-month postoperative image after PPV + SB (medium-lying oval sponge) c Postoperative OCT with well-defined outer retina layer biomarkers, irregular space at Henle´s layer, no residual subretinal fluid, and well-defined choroidal vessels. d The corresponding binarized processing image depicts a normal relationship between the total choroidal area (TCA) and luminal area (LA). The yellow dotted line indicates the selected subfoveal binarized area. The choroidal vascularity index (CVI) was lower than that in the contralateral eye. e Magnified image from the yellow inset depicting a preoperative choroidal vascularity index (CVI) of 47.2% calculated within the area clearly delineated by the yellow–red dotted line. f The choriocapillaris binarized image depicts a normal postoperative CFA of 2.113 mm² in a selected subfoveal flow area of 3.142 mm². This modified figure was adapted from [31] and used under Creative Commons Attribution 4.0, International License (https://creativecommons.org/licenses/by/4.0/)