Visual Factors Influencing Balance and Falls in Mild Glaucoma Patients

AbstractIn this paper, vision and balance measurement methods were used for factors affecting balance andfalls in mild glaucoma patients. The mean age of twenty mild glaucoma subjects was 69.5 ±5.28 yearshave mild (-3.38 ± 2.37 dB) VF damage. The high contrast (100%), low contrast (10%) visual acuities andstereoscopic vision were measured. The balance is formed the integrated information due to the stateof change of posture. The postural balancing is consisted of subsystems such as included the better andworse eye of NO/PO function. The balance method is measured the range of the Fourier Index by theF2~F8 status that is measured the NO/PO function from the better and worse eye. The results wereobserved as following: The low contrast visual acuity was low and the 12 cpd spatial frequency washigher in the high fall index group. In the better eye’s contrast sensitivity, special frequencies werenormal on the NO function, 9cpd was the highest at 0.263 ± 0.28 Hz, and 12cpd was the lowest (-0.27) ±0.08 Hz. In the worse eye’s contrast sensitivity, special frequencies were abnormal, 12cpd was the lowestat (–0.27) ± 0.08Hz. In the better eye’s special frequencies were normal on the PO function, 6cpd wasthe highest at 0.2 ± 0.44 Hz, and 3cpd was the lowest (-0.17) ± 0.48/ Hz. In the worse eye’s specialfrequencies were abnormal, 9cpd was the highest at 0.027 ± 0.69 Hz, and 12cpd was the lowest at (-0.353) ± 0.13Hz.The equilibrium index is related to contrast sensitivity of the better and worse eye. The fallindex calculated from the Fourier index was compared with visual function and confirmed that fallindex was correlated with low contrast visual acuity and spatial frequency.