Prevalence of Non Strabismic Binocular Vision Dysfunction among Engineering Students in Nepal

Abstract

Background: Engineering is one of the disciples of science which needs tedious near works, long run computer tasks and accurate focus and fixation. This study was carried out to assess the prevalence of Non-Strabismic Binocular Vision Dysfunctions (NSBVD)among engineering students in Nepal. Methodology: It was a cross-sectional study which was conducted among engineering students in different engineering colleges in Kathmandu valley (Kathmandu, Lalitpur and Bhaktapur districts), Nepal. Students in the age group of 18-30 years were included in the study. Each subject was examined to investigate for the presence of an NSBVD. Results: Of the 210 participants of age group 18 to 30 years examined,150 (71.41%) students presented some form of NSBVD. The prevalence of accommodative dysfunction, vergence dysfunction and oculomotor dysfunction was 21.42%, 28.57% and 10.00% respectively. The most common NSBVD was accommodative insufficiency(12.85%) followed by convergence insufficiency (11.42%). Conclusion: The present study indicates that non strabismic binocular vision dysfunctions are prevalent among engineering students in Nepal and accommodative insufficiency was the most prevalent. Keywords: Accommodative dysfunction; Engineering students; Oculomotor dysfunction; Vergence dysfunction Abbreviations: NSBVD: Non-Strabismic Binocular Vision Dysfunctions; NPA: Near Point of Accommodation; RAF: Royal Air Force; AF: Accommodative Facility