he Effects of Pressure and Light Environment on Human Visual Sensitivity

摘要

Visual is light made into the eyes produced by the visual impression,in order to gain the understanding differences of the external world.Lighting directly affect the efficiency and quality of visual access to information,light on vision stimulus needed to reach a certain intensity to cause visual.Researchers found that the effect of high altitude on human sensory function appeared earlier,in which the vision is most sensitive to hypoxia,at altitudes above 4300 meters,night vision was significantly impaired,and this will not improve by the compensatory response of the body or reduce the altitude (Bedford 1979).ln this paper,by simulating low-pressure environment,by vision test,we investigated the vision changes of the subjects when reduce atmospheric pressure.The experiment selected 24 graduate students (14 males and 10 females,students),they were divided int0 6 groups,each group took part in all conditions and the design of random sequence.At pressure decreasing experiments,pressure did have influence on visual sensitivity.Under the same pressure,visual acuity changes with pressure,illumination,color temperature changes,but there is no significant relations with gender,this requires further study in the future.