Reducing visual stress symptoms of VDT users with prescription eyeglasses

The use of Video Display Terminals (VDT’S) in modem information processing environments is associated with a variety of visual stress symptoms including eye strain, headaches, blurry vision and necldshoukler pain. This study evaluates a method of prescribing computer specillc glasses to improve vision and reduce symptoms. Thirty-seven computer users who suffer from VDT related visual symptoms wore two pairs of prescription eyeglasses for two weeks each in a double blind crossover experiment. The experimental glasses were prescribed using a Gaussian image testing device and the control glasses were prescribed using a standard paper Snellen chart. Data was collected on the frequency and severity of symptoms in their regular work environment as well as in a controlled laboratory setting. Results indicate that the experimental eyeglasses were preferred overall (p<.05). Visual stress symptoms were significantly reduced in frequency and severity for the eyeglasses prescribed using the Gaussian image testing device.