Emerging virtual and augmented reality (VR/AR) systems can produce highly immersive experiences, but also induce visual discomfort, eyestrain, and nausea for some users. One of the sources of these symptoms is the lack of natural focus cues in all current VR/AR near-eye displays. These displays project stereoscopic image pairs, driving the vergence state of the eyes to arbitrary distances. Howe...

OBJECTIVES To clarify the relation between the prevalence of dry eye syndrome and subjective symptoms of asthenopia in visual display terminal (VDT) operators. METHOD 722 VDT workers (242 subject workers with symptoms of asthenopia and 480 controls without such symptoms) without obvious organic ocular diseases received an ophthalmological examination consisting of refractometry and a tear fun...

In this paper, an attempt has been made to investigate the reflectance of various colours and effects of vary-ing colours on human working and production. Different colours have different reflectance and energy associ-ated with it. Colours play a significant role in the colour scheme of the houses, offices, factories etc. The col-ours may be seen on walls, tabletops, equipment, machines etc. In...

ONE of the most difficult therapeutic problems for the ophthalmologist at the present time is that of headaches associated with eye strain. The majority of these are associated with heterophoria and standard therapy has been disappointing. The initial response to drugs, e.g. atropine, and cholinesterase inhibition, has not been impressive and relapse after a while has been the rule. Costenbader...

Purpose: Three-dimensional (3D) video games played using virtual reality head-mounted displays (VR-HMDs) are becoming increasingly popular. However, the use of this technology may lead to visual symptoms and discomfort by disrupting normal linkage between accommodation vergence systems. This study aimed investigate effect playing 3D VR-HMDs on different oculomotor functions (i.e., and/or...