Accommodation Rock after Visual Display Unit (VDU) Activity under Two Different Ambient Lightings

Dynamic accommodation under natural viewings, such as driving, could be affected by the lighting condition. This study aimed to investigate the accommodation rock after the visual display unit (VDU) activity with and without ambient lighting. It was measured in cycle minute (cpm) with Hart Chart before and after each lighting condition's VDU activity. The VDU activity involved a one-hour visual task in 30 young adults. There was significant different [c2(3) = 23.42, p<0.001, Friedman test] in accommodative rock with VDU activity under different lightings. Low lighting lowered the rapid change of accommodation at different distances under natural viewing.