Purchase this article with an account.
D. A. Mackey, L. S. Kearns, C. Wilson, G. Silvestri, A. W. Hewitt, J. B. Ruddle, N. G. Martin, J. E. Craig, C. J. Hammond; Ocular Dominance, Refraction and Axial Length in Australian Twins. Invest. Ophthalmol. Vis. Sci. 2009;50(13):2438.
Download citation file:
© ARVO (1962-2015); The Authors (2016-present)
To investigate the association of ocular dominance with refraction and axial length in Australian twins.
Australian twins were examined as part of the Twins Eye Study in Tasmania (TEST) and Brisbane Adolescent Twin Study (BATS). Twin participants completed a questionnaire on their past medical and ocular history, followed by a comprehensive ocular examination. Ocular dominance was assessed by the Miles Test, a method whereby the participant brings both hands together at arms length to create a small opening, through which a distance object is viewed.
A total of 1867 twin participants aged between 5 and 90years had ocular dominance recorded. Mean ages of the twin participants were 21.2 years(SD=12.5) with 43.9% males and 56.1% females. There was no statistically significant difference in the spherical equivalent (SEQ) of the dominant eye -0.25D(SD=1.48D) and non dominant eye -0.23D(SD=1.62D) (p=0.098). There was a difference in mean astigmatism between dominant -0.36D(SD=0.44) and non dominant eyes -0.40D(SD=0.51) (p<0.001). The mean axial length of the dominant eye was 23.20mm(SD=0.89) compared to 23.18 mm(SD=0.9) in the non-dominant eye and this was statistically significant (p=0.012).
Ocular dominance is clinically relevant for monovision correction in contact lens wear/ refractive or cataract surgery as well as a determinant of visual handicap when the dominant eye is affected with disease. Consideration of ocular parameters associated with eye dominance should be factored into genetic studies of dominance.
This PDF is available to Subscribers Only