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ABSTRACT
The use of smartphone has increased rapidly over the years because of its importance in our daily lives and this led to an increase in the incidence of ocular problems among smartphone users. This study was aimed at investigating the effect of smartphone use on accommodative functions. A total of 70 participants were involved in this study, comprising of 47 (67.10%) males and 23 (32.90%) females, with a mean age of 22.80 ± 3.43 years. Amplitude of accommodation (AoA), negative relative accommodation (NRA), positive relative accommodation (PRA) and accommodative facility (AF) before and after 30 minutes of smartphone use were assessed. Amplitude of accommodation and accommodative facility were assessed both binocularly and monocularly. AF was measured using a ± 2DS flipper lenses and was recorded in cycles per minute(cpm). Paired t-test showed a significant reduction in AoA monocularly and binocularly by 0.87 ± 0.22D and 0.95 ± 0.19D, respectively (p < 0.001), it also showed a reduction in NRA by 0.48 ± 0.04D (p < 0.001). PRA significantly reduced by 0.48 ± 0.04D (p < 0.001) and a deterioration in AF monocularly and binocularly by 1.33 ± 0.02D and 1.29 ± 0.13D respectively (p < 0.001) was shown. The results of the study showed that engagement in prolonged near work associated with smartphone use for a period of 30 minutes resulted in a reduction in the various accommodative functions assessed. Keywords: Accommodation, Smartphone, Computer vision syndrome.
