Refractive and Binocular Vision Status and Associated Asthenopia among Clinical Microscopists

Background Clinical microscopists are at a greater risk of developing binocular vision anomalies and asthenopia.
 Objective To assess the refractive status to explore association between presence asthenopic symptoms microscopy work among clinical working medical laboratory department.
 Method This cross-sectional study involved 37 department Dhulikhel Hospital, Nepal. The was conducted from January December 2013. Only those participants who had been using microscope for least year were enrolled in this study. Each participant underwent distance visual acuity (VA) assessment, refractions, orthoptic evaluation, including measurement near phoria, point convergence (NPC), accommodation (NPA), positive fusional vergence (PFV), adduction, calculation convergence/accommodation (AC/A) ratio. tear test also carried out each subject. Information about use glasses, (duration, time spent per day microscope), associated with such as eye strain, headache, double vision, collected.
 Result mean age 29 ± 5.7 years. prevalence error 56.76% spherical equivalent (SE) -0.77 0.86 D. Refractive neither correlation it, nor parameters- NPC, AA AC/A However, there work. There statistically significant difference symptomatic asymptomatic subjects parameters, (PFV) near.
 Conclusion Microscopy has an impact on vision. Asthenopic bear no either works or symptoms.