Evaluation of visual performance depending on tolerability of optical correction

Accommodative asthenopia is common in myopic patients when permanent full correction is prescribed, since their accommodative system does not tolerate increased stress due to close work. AIM: To evaluate visual performance in myopic school children depending on tolerability of optical correction. MATERIAL AND METHODS: A total of 154 children (11 to 16 years) with different levels of myopia, wearing corrective spectacles. Of them, 56 and 98 school children had good and poor tolerability of optical correction according to computed accommodation test, respectively. Accommodation was measured using autorefractor Righton Speedy-K ver. MF-1. Visual performance was evaluated using Bourdon test. Performance accuracy (At), accuracy factor (Ta), productivity (Pt), endurance factor (Kp), and speed of information processing (S) were determined. RESULTS: In the group where spectacle correction caused asthenopia during visual tasking, performance accuracy, productivity, and accuracy factor exceeded the mean values in children without signs of accommodative asthenopia. But endurance factor and speed of information processing are significantly lower compared to the children with good tolerability of optical correction. CONCLUSION: Tolerability of optical correction affects visual performance of school children. Poor tolerability of optical correction significantly decreases visual performance parameters, such as performance accuracy, productivity, and endurance.