Anterior chamber parameters in simple myopia and hypermetropia using Pentacam

Abstract

Background Measurement of the anterior chamber parameters of the eye is an essential test and must be done in ophthalmic practice. Many studies were focused on the differences between the values of anterior segment parameters of myopic and hypermetropic eyes from that of emmetropic eyes. A significant correlation has been found between the RE and anterior chamber parameters. However, the strength of the correlation varied according to the race and the age of individuals. Objective To measure anterior chamber parameters (central corneal thickness, thinnest corneal thickness, apex corneal thickness, corneal volume, anterior chamber depth, anterior chamber volume, and anterior chamber angle) in simple myopia and hypermetropia and emmetropia to evaluate their effect on the anterior chamber. Patients and methods Patients presented with errors of refraction. Their SE ranged between −5 and +5.37 D. Their mean age was 29.70±5.55 years, ranging from 20 to 39 years old. The study included 63 (52.5%) right eyes and 57 (47.5%) left eyes. We examined 120 eyes divided into three groups according to their SE. Group I (control group) included 40 eyes with normal refraction, group II included 40 eyes with simple myopia less than −6 D, and group III included 40 eyes with hypermetropia less than 6 D. Results The main central corneal thickness in emmetrope, myope, and hypermetrope was 518.45±50.99, 531.95±43.04, and 552.90±34.44 μm, respectively; corneal volume was 58.10±4.35, 60.17±3.94, and 61.03m3±3.99 m3, respectively; mean anterior chamber depth was 2.98±0.29, 3.34±0.29, and 2.63 ±0.28 m2, respectively; mean anterior chamber volume was 178.98±30.63, 202.25±28.50, and 133.68±25.76 m3m3, respectively; and mean anterior chamber angle was 37.61±6.00, 42.87±3.62, and 31.10±3.76°, respectively. Our results add to the evidence that errors of refraction have an effect on anterior chamber parameters. Conclusion This study provided valuable measurements of anterior chamber parameters of the Egyptian adults with error of refraction.