A retrospective study compared anterior segment eye structures in patients with unilateral neovascular glaucoma (NVG) with age- and sex-matched normal eyes using ultrasound biomicroscopy (UBM). Contralateral eyes (unaffected) showed significantly shallower anterior chambers (decreased ACD), narrower angles (decreased AOD500/750 and TIA500/750), and posterior iris arching (increased IC), with all differences at p < 0.05. These changes were more pronounced in older patients. The parameters IC, ACD and AOD750 showed strong discriminative power in ROC analysis with AUC > 0.7. Correlation showed a positive relationship of AOD500 with ACD and TIA, but negative with IC and IT750, suggesting an effect of age on angle anatomy. UBM serves for the quantitative assessment of risks in the contralateral eyes of NVG patients, especially in the elderly.