Comparison of perceptual eye positions among patients with different degrees of anisometropia

Abstract

PurposeTo compare the perceptual eye positions among patients with different degrees of anisometropia.Methods157 patients were recruited and devided into 3 groups according to the spherical equivalent (SE) difference between two eyes: group A with anisometropia>2.50D, group B with anisometropia>1.00D and ≤2.50D, group C with anisometropia ≤1.00D. The degree of refractive errors in presence of astigmatism was converted into the degree of spherical equivalent. We compared the vertical and horizontal perceptual eye positions among the three groups, using polarized monitor and three‐dimension (3D) polarized glasses. The results were recorded and statistically analyzed by SPSS19.0.ResultsGroup A included 32 patients, aged (14.51 ± 9.50) years old; group B included 37 patients, aged (15.52 ± 9.61) years old; group C included 88 patients, aged (15.03 ± 9.73) years old. There was no significant difference in age among the three groups. The SE differences between two eyes were as follows: group A (5.04 ± 2.92) D, group B (1.48 ± 0.40) D, group C (0.31 ± 0.28) D. The average vertical perceptual eye position pixels were (13.84 ± 13.87) in group A, (6.51 ± 7.19) in group B and (7.60 ± 9.26) in group C. There were significant differences between group A and group B (p < 0.05), group A and group C (p < 0.05), while no significant difference between group B and group C (p > 0.05). The average horizontal perceptual eye position pixels were (62.78 ± 94.81) in group A, (42.37 ± 55.96) in group B and (47.90 ± 56.18) in group C. There was no significant difference among the three groups (p > 0.05).ConclusionsThere was obvious deviation in vertical perceptual eye position in patients with anisometropia>2.50D, indicating that the unstability of vertical perceptual eye position might be a critical factor for the development of anisometropia.