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Association of range of accommodation with fully corrected refractive errors


International Journal of Family & Community Medicine
Rashid Asghar Khan,1  Adnan Afsar,2 Muhammad Imshad Khan2

Abstract

Background: To study whether the range of accommodation differs in myopes and hypermetropes than normal population. Purpose: To study the range of accommodation in myopes and hypermetropes in comparison to normal population in different age groups.
Materials and methods: A comparative cross-sectional study was conducted at MHL from January 2018 to October 2018. Total 99 patients were enrolled in this study who had refractive errors. All patients were included who had 10 – 55 years age. Both genders were included. Both myopic and hypermetropic patients were included having fully corrected myopia and hypermetropia. Patients with any ocular pathologies were excluded. All patients who were included in this study had complete ocular and posterior chamber examination from ophthalmologist. There visual acuity was recorded using Snellen`s visual acuity chart and recorded in Snellen notation. Near vision was assessed on near vision chart. Then range of accommodation will be measured by RAF meter. All data entered and analyzed by SPSS 20 (Statically package for social scientist). Bar charts and Pie charts were used to describe qualitative data and range, mean, S.Dwere used to express quantitative data. For data normality Kolmogorov-Smirnov and Shapiro Wilktest used and showed that all parameters are non-parametric as p value is ≤ 0.05 (p = 0.000).
Results: Total 99individuals were analyzed who had refractive errors. There were 60 female and 39male individuals. Avg age of individuals was 21 with standard deviation ±3. Association of rang of accommodation between hypermetropes and emmetropes during point break, Rec point and Rang D the p value is 0.001 in all points. Association of rang of accommodation between emmetropes and myopes during point break, Rec point and Rang D the p value is 0.142, 0.224 and 0.315 accordingly.
Conclusion: Association of rang of accommodation is significant between emmetropes and hypermetropes (p=0.001). But there is no significant association of rang of accommodation between Myopes and emmetropes (p=0.224). Keywords: refractive errors, accommodati

Keywords

refractive errors, accommodation, presbyopia, crystalline lens, ciliary muscles

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