TY - JOUR T1 - Evaluation of blood vessel network formation and visual field defect in optic disc melanocytoma JF - British Journal of Ophthalmology JO - Br J Ophthalmol DO - 10.1136/bjophthalmol-2021-319630 SP - bjophthalmol-2021-319630 AU - Jay Jiyong Kwak AU - Dong Hyun Lee AU - Sung Chul Lee AU - Christopher Seungkyu Lee Y1 - 2021/09/26 UR - http://bjo.bmj.com/content/early/2022/04/21/bjophthalmol-2021-319630.abstract N2 - Aim To investigate the association between visual field defects and blood vessel network (BVN) formation in optic disc melanocytomas (ODMs) using optical coherence tomography angiography (OCTA).Methods Single-centre, retrospective case series of 32 eyes of 32 patients with ODM, in which eyes were divided into two groups based on complete and incomplete BVN formations.Results OCTA revealed incomplete BVN formation in 16 of 32 ODMs. The location of BVN absence corresponded to the location of hypofluorescence from fluorescein angiography (FA) in 12 (75%) and to the location of visual field defect in 13 (81%) ODMs in the incomplete BVN group. Perimetric indices were significantly worse in the incomplete BVN group than in the complete BVN group. Linear regression of mean deviation (MD) and Visual Field Index (VFI) on the area of BVN absence were statistically significant (p=0.01 and p=0.003, respectively), whereas linear regressions of MD and VFI on the tumour area were not statistically significant (both p=0.09) in the incomplete BVN group.Conclusion The location of BVN absence within ODMs corresponded to the location of visual field defect and the location of FA hypofluorescence. Visual field defect was more severe in the incomplete BVN group than in the complete BVN group. Visual field defect was more significantly associated with the area of BVN absence than the tumour area.Data are available upon reasonable request. Data are available from the corresponding author upon reasonable request. ER -