Relationship of 24-2C Central Visual Field Damage to Juxtapapillary Choriocapillaris Dropout in Glaucoma Eyes With or Without Axial Myopia.

Précis: Larger choriocapillaris microvasculature dropout area and wider angular circumference are significantly associated with 24-2C central visual field damage in primary open angle glaucoma eyes with and without axial myopia.

Purpose

To evaluate the relationship between a juxtapapillary choriocapillaris microvasculature dropout (MvD) and central visual field (VF) damage in primary open angle glaucoma (POAG) patients with or without axial myopia.

Methods

This cross-sectional study included 125 patients with POAG or glaucoma suspects stratified into no axial myopia (axial length (AL) ≤24 mm; 46 eyes), mild axial myopia (24 mm < AL ≤26 mm; 81 eyes), and high axial myopia (AL >26 mm; 59 eyes). Presence, area, and angular circumference of juxtapapillary MvD were evaluated on OCT-A en-face choroidal images and B-scans. Perimetry was conducted using the 24-2C and 10-2 Humphrey program.

Results

Mean 24-2C VF mean deviation was significantly worse in eyes with MvD compared with eyes without MvD across all groups (all P <0.042). Central VF defects detected in the 24-2C and 10-2 VF tests were significantly more prevalent among eyes with MvD (68.3% and 81.7%, respectively) compared with eyes without MvD (19.0% and 38.1%, respectively) ( P <0.001) in the mild axial myopia group. In multivariable analysis, larger MvD area ( P =0.014) and wider MvD angular circumference ( P =0.006) were significantly associated with higher likelihood of the presence of 24-2C central VF damage in overall cohort.

Conclusions

MvD area and angular circumference are significantly associated with central VF damage detected by VF 24-2C in POAG eyes with and without axial myopia. Choriocapillaris MvD assessment shows promise for identifying POAG patients with a higher risk of having central VF defects and may provide clinical insights into the pathogenesis of glaucoma in myopia.