Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/23028
Title: Interocular symmetry in myopic anisometropia
Authors: Vincent, SJ
Collins, MJ
Read, SA
Carney, LG
Yap, MKH 
Keywords: Aberrations
Anisometropia
Biomechanics
Dominance
Myopia
Issue Date: 2011
Publisher: Lippincott Williams & Wilkins
Source: Optometry and vision science, 2011, v. 88, no. 12, p. 1454-1462 How to cite?
Journal: Optometry and vision science 
Abstract: Purpose. To investigate the interocular symmetry of optical, biometric, and biomechanical characteristics between the fellow eyes of myopic anisometropes. Methods. Thirty-four young, healthy myopic anisometropic adults (1 D spherical equivalent difference between eyes) without amblyopia or strabismus were recruited. A range of biometric and optical parameters were measured in both eyes of each subject including axial length, ocular aberrations, intraocular pressure, corneal topography, and biomechanics. Ocular sighting dominance was also measured. Results. Mean absolute spherical equivalent anisometropia was 1.70 ± 0.74 D, and there was a strong correlation between the degree of anisometropia and the interocular difference in axial length (r = 0.81, p < 0.001). The more and less myopic eyes displayed a high degree of interocular symmetry for the majority of biometric, biomechanical, and optical parameters measured. When the level of anisometropia exceeded 1.75 D, the more myopic eye was more likely to be the dominant sighting eye than for lower levels of anisometropia (p = 0.002). Subjects with greater levels of anisometropia (>1.75 D) also showed high levels of correlation between the dominant and non-dominant eyes in their biometric, biomechanical, and optical characteristics. Conclusions. Although significantly different in axial length, anisometropic eyes display a high degree of interocular symmetry for a range of anterior eye biometrics and optical parameters. For higher levels of anisometropia, the more myopic eye tends to be the dominant sighting eye.
URI: http://hdl.handle.net/10397/23028
ISSN: 1040-5488
EISSN: 1538-9235
DOI: 10.1097/OPX.0b013e318233ee5f
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