Abstract

A STUDY OF A-SCAN BIOMETRY AND KERATOMETRY IN DIFFERENT REFRACTIVE STATES AT A TERTIARY CARE CENTRE

Author(s): Shyam Savith Varanasi1, Lakshmoji Naidu Kotipalli2

BACKGROUND Uncorrected refractive error is the second largest cause of treatable blindness after cataract. The purpose of this present study is to describe the relationship between refractive errors, axial ocular dimensions, anterior chamber depth and corneal curvature, specifically to determine whether the refractive associations of these biometric variables are mutually related. The aim of the current study is to determine the relationship between axial length, anterior chamber depth and keratometry in different refractive states.
MATERIALS AND METHODS
A cross-sectional study of 250 patients attending the Government General Hospital of Rangaraya Medical College, Kakinada, from October 2014 to August 2016 with defective vision, headache and asthenopia are recruited.
RESULTS
Out of 250 patients, 52 (20.80%) are found to be emmetropic (taken as controls), 83 patients (33.20%) myopes and 115 patients (46.00%) hypermetropes. More of myopes are seen in 10-19 years of age group when compared to hypermetropia, which is common in 30-40 years age group in this sample. CONCLUSION Axial length of the eyeball determines the refraction many a times. Corneal curvature (radius of curvature of the cornea) is important in causing astigmatic error.