Eunoo Bak 1 , 2 , Young Kook Kim 1 , 2 , Ahnul Ha 1 , 3 , Young Soo Han 2 , 4 , Jin-Soo Kim 1 , 5 , Jinho Lee 1 , 6 , Yong Woo Kim , 1 , 2 , Sung Uk Baek 1 , 7 , Jin Wook Jeoung 1 , 2 , Ki Ho Park 1 , 2
06 July 2021
To investigate the relationship between intereye visual field defect (VFD) asymmetry and subsequent VF progression in primary open-angle glaucoma (POAG).
Moderate-stage patients with POAG (226 eyes of 113 patients) with a single hemifield defect were followed for 8.7 years. Participants were categorized into three groups by initial VF pattern: (1) unilateral VFD, (2) bilateral VFD within same hemifield (superior–superior, inferior–inferior), (3) bilateral VFD within opposite hemifield (superior–inferior). The mean deviation (MD) difference between the intereye was defined as the intereye MD asymmetry index (iMAI). Intereye visual-sensitivity difference within the same hemifield was calculated as the intereye hemifield visual-sensitivity asymmetry index. Functional progression was detected by Glaucoma Progression Analysis. The overall rate of MD change and the association between new indices were evaluated by linear regression. A Kaplan-Meier survival analysis was performed and the factors associated with glaucoma progression were evaluated by Cox proportional hazard modeling.
Unilateral VFD eyes and bilateral VFD eyes within opposite VF hemifield showed significant progression and faster rate of MD change compared with bilateral VFD eyes within same VF hemifield (71.1% vs. 45.9% vs. 21.1% [ P = 0.001]; –1.27 dB/y vs. −0.64 dB/y vs. −0.32 dB/y [ P = 0.001]). Unilateral VFD eyes showed the fastest time to VF progression compared with other groups ( P = 0.002). A faster rate of MD change was associated with greater intereye MD asymmetry index ( P = 0.001) and greater intereye hemifield visual-sensitivity asymmetric index ( P = 0.031), which were significant risk factors for glaucoma progression (all P < 0.001).