NORMAL VARIATION OF PRESBYOPIA

Abstract

Abstract This study aimed to estimate the prevalence of presbyopia among Sudanese population in Khartoum. Age enrolled in the study was from (30-50) years. The studied subjects were (600), 290 were males and 310 were females divided into four age groups as follows: - Group A (30 — 35 years) - Group B (35 — 40 years) - Group C (40 — 45 years) Group D (45 — 50 years) The prevalence of presbyopia has been found to be (72.67%), among all subjects studied with significant increasing with age in groups (A, B, C) but group (D) showed slight decreasing in the prevalence of presbyopia. The distribution of subjects studied according to refractive status was (31.83 %) emmetropes, (39.33 %) hypermetropes, (21.50 %) myopes and (7.33 %) astigmatic. Presbyopia was found to be higher among hyperrnetropic subjects (3l.50%), slightly less in emmetropes (28.00%) lesser in myopes (ll.l7%) and very few subjects reveal astigmatic error (2.00 %). According to gender the study showed that the prevalence of presbyopia was higher among females (38.83%) than males (33.83%). Non presbyopic subjects were found to be (27.33%) among the studied population, classified in to (l0.33%) myopes, (7.83%) hypennetropes, (5.33%) astigmatic and (3.83%) emmetropes. The measured amplitude of accommodation was found to decline with advancing age and there was a significant difference between the presbyopic and the non-presbyopic

The average amplitude of accommodation was found to be vary fi"om 2.5 to 6.38D, While it was 3.39 to 6.77D in the non-presbyopic. The ordered correction increased with age and varied from 0.83 to l.74D, with considerable fluctuation between males and females in different age groups. Key words: Presbyopia- age- amplitude of accommodation- refractive state- and addition. ii