OBJECTIVE: To evaluate the effects of short-term VDT usage on visual functions. METHODS: Visual function of the video display terminal (VDT) operators before and after 1 hour VDT usage were assessed. These included refraction, amplitude of accommodation, near point of convergence, AC/A, phorias, fusional convergence and divergence, tear film break time (BUT) and aberrations. And the same situation was compared was the non-VDT usage. RESULTS: In comparison with pre-VDT use, amplitude of accommodation, BUT were significantly decreased (P < 0.05), near point of convergence, near lateral exophoria were significantly increased after VDT use (P < 0.05). Total, high order, 4th and 5th order aberrations were significantly greater after VDT use (P < 0.05). CONCLUSIONS: Short-term VDT work does have a significantly greater temporarily effect on visual function, tear film quality and visual quality.
OBJECTIVE: To evaluate the effects of short-term VDT usage on visual functions. METHODS: Visual function of the video display terminal (VDT) operators before and after 1 hour VDT usage were assessed. These included refraction, amplitude of accommodation, near point of convergence, AC/A, phorias, fusional convergence and divergence, tear film break time (BUT) and aberrations. And the same situation was compared was the non-VDT usage. RESULTS: In comparison with pre-VDT use, amplitude of accommodation, BUT were significantly decreased (P < 0.05), near point of convergence, near lateral exophoria were significantly increased after VDT use (P < 0.05). Total, high order, 4th and 5th order aberrations were significantly greater after VDT use (P < 0.05). CONCLUSIONS: Short-term VDT work does have a significantly greater temporarily effect on visual function, tear film quality and visual quality.
Authors: J K S Parihar; Vaibhav Kumar Jain; Piyush Chaturvedi; Jaya Kaushik; Gunjan Jain; Ashwini K S Parihar Journal: Med J Armed Forces India Date: 2016-05-25
Authors: Francesca Larese Filon; Anna Drusian; Federico Ronchese; Corrado Negro Journal: Int J Environ Res Public Health Date: 2019-07-13 Impact factor: 3.390