Anterior Segment Optical Biometric Parameters and Refractive Errors in a Sample of Iraqi Population

Abstract

Background: There are few population-based age norms for refraction and ocular biometry in Iraqi population, and the anterior segment parameters are of paramount importance in the prediction of liability of person to primary angle closure glaucoma, and this study tries to explore any relation of anterior segment parameters and refractive errors in a sample of Iraqi population.
Objective: define the of anterior segment biometric parameters in a sample of Iraqi population with refractive errors and to find the correlation between those parameters and refractive errors.
Patients and Methods: In a cross sectional study 371 patients in whom the refractive errors were measured with subjective and objective measures the mean for myopia in male was -4.66±4.86 D and 5.31±4.86 D in female the mean for hyperopia +1.94±2.07 D and 1.74±1.84 D for male and female respectively.
The anterior chamber angle, depth and K-readings were measured by Pentacam® (Oculus, HG, Germany), Examination of the anterior segment using slit lamp and fundoscopy using Volk 90 D were done to exclude any underlying pathology manifest and cycloplegic refraction done by both auto refractometer (Topcon ker. 800) and retinoscopy.
Results: 371 patients (742 eyes), mean age 29.48 ±7.33, myopia presented in 311 and hypermetropia in 60.

• There is an increase in anterior chamber angle width in myopia and decreased width in hyperopia.
• There is an increase in AC angle width when increased corneal curvature and vice versa.
• Positive correlation between ACA width and AC depth.
• The anterior chamber depth increased in myopia and decreased in hypermetropia.