Abstract
Purpose: To investigate quantitatively in young adults therelationship between long-term cumulative nearwork, degradation ofdynamic accommodative ability and the presence of asthenopic symptoms. Methods: Subjects consistedof 87 young students and office workers between 18 and 31 years of age with uncorrectedvisual acuity of 20/30 or better in each eye. The amounts of nearwork, dynamic accommodativefacility, and level of asthenopic symptoms were measured for each subject. Results:Total cumulative nearwork time was negatively correlated with accommodative facilityand positively correlated with the number of asthenopic symptoms. Furthermore,significant correlations were found between total nearwork time and blurred vision, andblurred vision and reduced accommodative facility. Moreover, the sub-category of ``hoursspent reading over the years'' was found to be significantly correlated with decreasedaccommodative facility. Conclusions: The correlations suggest a relationship betweencumulative amount of nearwork, decreased accommodative facility and asthenopia.
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Iribarren, R., Fornaciari, A. & Hung, G.K. Effect of cumulative nearwork on accommodative facility and asthenopia. Int Ophthalmol 24, 205–212 (2001). https://doi.org/10.1023/A:1022521228541
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DOI: https://doi.org/10.1023/A:1022521228541