Rabia Mobeen, Rabia Batool, Faisal Rashid, Mohammad Siddique.
Effect of Accommodation on Auto Refractometer Reading in Different age Groups.
Ophthalmol Update Nov ;14(3):21-4.

Objectives: Objective of this study is to investigate whether there is any effect of accommodation on Autoref reading before and after cycloplegia and to check out which age and type of refractive error is more effected by accommodation. Methods: An informed consent was obtained describing the detail of study and its implication. Therefore the subject was assured of their confidentially of information and outcome. Four groups were selected and effect of accommodation on patients autoref reading were measured. Autorefractor reading was noted before and after cycloplegia. Autoref reading was taken without cycloplegia in different age groups and then by using cyclopentolate to relax the accommodation and by repeating the autoref reading to find out difference in reading before and after cycloplegia. 110 patients of age group 3 to 60 were assessed by that method. Results: Accommodation affects different age groups except old age. Accommodation effects on refractive error more in age 3-15 years because accommodation is stronger in children. There was significant difference between morning and evening amplitude of accommodation as p<0.005. Conclusions: Accommodation affects different age group and the effect is maximum between 3-15 years and decreases with increasing age. Autoref overestimate myopia and under estimate hyperopia without cycloplegia. By using cycloplegia exact refractive error can be measured.

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