Induced pupillary hippus following near vision: increased occurrence in visual display unit workers

Article Abstract:

Researchers investigated the reportedly higher incidence of hippus amongst VDU (Visual Display Unit) workers. Hippus, in this context, is the pupillary instability which occurs in the frequency of 0.2 Hz, although it can, in other circumstances, also define the pupillary instability which occurs across a wide frequency. Research has suggested that the hippus is associated with asthenopia or general tiredness. The researchers found that 30% of VDU workers with asthenopia or fatigue displayed hippus, compared to 4% in the general population, but the reason for the hippus is not clear.

Health aspects, Computers, Digital computers, Asthenopia, Pupil (Eye)

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Relations between individual differences in oculomotor resting states and visual inspection performance

Article Abstract:

Individual differences in dark vergence are related to individual differences in visual inspection performance. Individuals with far dark vergence positions perform a near visual inspection task slowly. This is not the case with individuals having closer dark vergence positions. The inspection task performance is faster in individuals with comparatively large inward shifts in dark vergence. A minimization in the disparity between task distance and the dark vergence posture will enhance the performance of visual inspectors.

Observations, Visual discrimination

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Changes in oculomotor functions before and after loading of a 3-D visually-guided task by using a head-mounted display

Article Abstract:

A three-dimensional visually guided task, wherein the movement of a target was given using a head-mounted display was performed and changes in visual and oculomotor functions were tested before and after the task. No significant change was observed in the accommodative convergence/accommodation ratio and the stereo-acuity, while there were changes noted in refraction and ocular convergence. Minimal but significant hyperopic changes were noticed in refraction after the task.

Physiological aspects, Three-dimensional display systems, Three dimensional displays, Vision

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