INTRODUCTION Refractive error remains one of the primary causes of visual impairment in children worldwide, and the prevalence of refractive error varies widely. The objective of this study was to determine the prevalence of refractive error and study the possible associated factors inducing refractive error among primary school children of Malay ethnicity in the suburban area of Kota Bharu, Ke...

Despite the importance of crystalline lens power in ocular development, schematic refractive index values used to calculate lens power have been validated for children. We measured refractive error and ocular component dimensions in 519 schoolchildren, calculating lens power using phakometrically measured lens radii and three different refractive index profiles: (1) Gullstrand-Emsley schematic ...

afael Navarro nstituto de Ciencia de Materiales de Aragón ICMA onsejo Superior de Investigaciones Científicas-Universidad de Zaragoza, Facultad de Ciencias laza San Francisco s/n 0 009 Zaragoza, Spain -mail: [email protected] Abstract. A theoretical framework to formulate and solve the problem of obtaining the objective refraction of an eye from aberrometric data is presented. Matrix formalism...

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In this editorial by Lisa Keay and David S Friedman (BMJ 2011;343:d4793, doi:10.1136/bmj.d4793) the authors mixed up their workplace affiliations. The workplace affiliation for Lisa Keay should have been the one given for David S Friedman, and vice versa.

Refractive errors, myopia and hyperopia, are the most common causes of visual impairment worldwide. Recent advances in genetics have been utilized to identify a wealth of genetic loci believed to contain susceptibility genes for refractive error (RE). The current genetic evidence confirms that RE is influenced by both common and rare variants with a significant environmental component. These st...

A retrospective analysis of 388 records of patients undergoing surgery for cataract between the years 1968 and 1978 showed that more women than men were admitted. About 13.7% of the patients were diabetic, and there was a striking excess of women over men with diabetes and cataract. The diabetic patients required surgery at an earlier age than the non-diabetics. Patients who had been refracted ...