Age, Amplitude of Accommodation and Near Addition Power of Adult Nigerians

Ovenseri-Ogbomo, G.O.¹and Nosakhoro, E¹

Department of Optometry, Faculty of Life Sciences, University of Benin, Benin City, Nigeria

Corresponding Author: Ovenseri-Ogbomo, G.O. Email: godwin.ovenseri-ogbomo@uniben.edu Phone: + 234 8060962506

Abstract

This study was undertaken to determine the relationship among age, the amplitude of accommodation (AA) and near additional add power in Nigerian adults. A cross-sectional study was undertaken in 297 adults comprising 158 (53.3%) males and 139 (46.8%) females and aged 33 – 89 years. The amplitude of accommodation was measured using the push-up method and the near addition power was determined using the plus lens to clear near vision method. Multivariate analysis was used to determine the relationship among the age of the participants, the amplitude of accommodation and near add power. The mean age of the participants was 52.9 ± 11.5 years (95% confidence interval = 51.6 – 54.2). The mean amplitude of accommodation was 2.07 ± 1.19 D (95% confidence interval = 1.93 – 2.21) while the mean add power was 2.06 ± 0.57 D (95 % confidence interval = 2.00 – 2.12). There was a strong negative correlation between AA and age (r = – 0.879, p < 0.001), between AA and near add power (r = – 0.777, p < 0.001) and a strong positive correlation between near add power and age (r = 0.813, p < 0.001). There is an inverse relationship between AA and age and between AA and near add power and a direct relationship between age and near add power for Nigerian adults.

Keywords: Presbyopia, the amplitude of accommodation, near addition power, age, Nigerians