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Anisometropia is independently associated with both spherical and cylindrical ametropia

Qin, Xue-Jiao, Margrain, Thomas Hengist, To, Chi Ho, Bromham, Nathan Robert and Guggenheim, Jeremy Andrew 2005. Anisometropia is independently associated with both spherical and cylindrical ametropia. Investigative Ophthalmology & Visual Science 46 (11) , pp. 4024-4031. 10.1167/iovs.05-0120

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Abstract

Purpose. To explore the associations between anisometropia and spherical ametropia, astigmatism, age, and sex. Method. Associations between the prevalence and magnitude of anisometropia with age, sex, spherical power, and cylindrical power, were assessed in a group of 90,884 subjects attending optometry practices in the United Kingdom. Logistic regression models were used to assess the independent contribution of each explanatory variable. Results. Logistic regression analyses that included all subjects or just those aged 20 to 40 years showed that spherical ametropia and astigmatism were independently associated with anisometropia (myopes, P < 1.0E–61; hyperopes, P < 1.0E–11). Anisometropia was relatively stable between the ages of 20 and 40 years, but then became more common with age, in myopes from the age of 40 years onward (P < 0.003) and in hyperopes from the age of 70 years onward (P < 1.0E–6). Sex was not associated with anisometropia to a clinically significant extent. Conclusions. This is the first study to show an independent association between anisometropia and both spherical ametropia and astigmatism. The results also suggest that the previously noted increased prevalence of anisometropia with age occurs later in hyperopes than in myopes, once other covariates have been controlled for. However, it could not be ruled out that this latter effect was due to clinical selection bias in our sample. The findings suggest that research projects involving the recruitment of highly ametropic subjects, such as those investigating the genetics of refractive error, may benefit by avoiding the use of stringent inclusion criteria for anisometropia, because otherwise a large proportion of the relevant population will be excluded.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Optometry and Vision Sciences
Subjects: R Medicine > RE Ophthalmology
Additional Information: Confirmation received by publisher on 21 February 2014 that publisher's pdf can be self-archived 6 months after publication.
Publisher: Association for Research in Vision and Ophthalmology
ISSN: 0146-0404
Date of First Compliant Deposit: 30 March 2016
Last Modified: 04 Jun 2017 01:58
URI: http://orca.cf.ac.uk/id/eprint/6880

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