Industrial lighting covers a wide range of different characteristics of working interiors and work tasks. This study investigated the effects of illumination on visual workload in visual display terminal (VDT) workstation. Ten college students (5 males and 5 females) were recruited as participants to perform VDT signal detection tasks. A randomized block design was utilized with four light colo...

In this paper, we analyze the visual discomfort caused by camera panning in 4K UHD contents. UHD is expected to provide a sense of realness to viewers, with four times more pixels than HD. However, UHD may yield undesirable artifacts, such as the stroboscopic effect from displaying frequency and visual fatigue due to moving objects. To investigate the visual discomfort in the presence of camera...

Children of footwear making units are working in the soling process. The process includes fixing of upper part with the sole of the footwear. The adhesives contain a mix of organic solvents, which are released in the working environment and cause irritation and lacrimation of eyes. In addition poor illumination and ventilation further aggravates the eyestrain. The present study was carried out ...

In this paper, we propose a real-time virtual reconvergence hardware platform especially to reduce the visual fatigue caused by stereoscopy. Our virtual re-convergence hardware platform, which consists of image rectification, disparity estimation, depth postprocessing, and virtual view control, is implemented in 60 fps on a single Xilinx Virtex-5 FPGA chip.

OBJECTIVE Tissue injuries caused by the thermal effects of xenon light microscopes have previously been reported. Due to this, the development of a safe microscope light source became a necessity. A newly developed laser light source is evaluated regarding its effectiveness and safety as an alternative to conventional xenon light source. METHODS We developed and tested a new laser light sourc...

Simulated immersive environments displayed on large screens are a valuable therapeutic asset in the treatment of a range of psychological disorders. Permanent environments are expensive to build and maintain, require specialized clinician training and technical support and often have limited accessibility for clients. Ideally, virtual reality exposure therapy (VRET) could be accessible to the b...

[Purpose] This study was performed to investigate the effects of yogic eye exercises on eye fatigue in undergraduate nursing students. [Subjects and Methods] The study used a pretest-posttest design with a non-equivalent control group. Forty undergraduate nursing students were selected by convenience sampling, with 20 assigned to an exercise group and 20 assigned to a control group. The yogic e...

PURPOSE To study the efficacy of several subjective and objective methods of accommodation measurement in normal prepresbyopic and presbyopic populations to identify appropriate methods for measuring the outcome of accommodative restorative procedures. SETTING University of Houston, College of Optometry, Houston, Texas, USA. METHODS Thirty-one normal subjects with a mean age of 43.7 years (...

Purpose In this study, we investigated whether an individual's visual fatigue can be evaluated objectively and quantitatively from their ability to maintain binocular fusion. Methods Binocular fusion maintenance (BFM) was measured using a custom-made binocular open-view Shack-Hartmann wavefront aberrometer equipped with liquid crystal shutters, wherein eye movements and wavefront aberrations ...