Central and Peripheral Visual Sensitivity Assessment in Low to Moderate Myopia

The aim of the present study was to evaluate the correlation between peripheral and central visual sensitivity threshold and myopia in mild and moderate myopic eyes using Humphrey Field Analyzer (HFA).
Twenty-nine subjects (58 eyes) with a mean refractive error of -2.98±1.2 D have undergone perimeric evaluation using peripheral 60-4 strategy in Humphrey device. The visual field was divided into three isopter rings: 30-40, 40-50 and 50-60 degrees. In each ring, the mean threshold was compared between the two myopic groups. Foveal thresholds were also measured and compared between groups.
In comparison between the mild and moderate myopic groups, there were not any significant differences in 30-40 ring (p=0.42), 40-50 ring (p=0.45) and 50-60 ring (p=0.35). However, a significant but negative correlation was found between foveal threshold and myopia (r=-0.33, p=0.01)
Lack of any correlation between myopia and peripheral sensitivity threshold demonstrates that peripheral visual field is not a variable parameter in myopia studies. Further studies and in larger scales are recommended.