a comparison of the effect of reduced illumination and tinted lenses on stereospsis at near

Clicks: 207
ID: 229700
2007
Free PDF
Article Quality & Performance Metrics
Overall Quality
Not rated
Combines reader engagement with the AI quality analysis. This article has not been analysed, so there is no overall score — reader engagement is measured and shown alongside.
AI Quality Assessment
Not analyzed
Readership in this journal
Popular

Ranked #58 of 124 articles by views in computers in human behavior

Most read Least read

Bar heights use a square-root scale. Only the 120 most-read articles are drawn; the journal has 124 in total.

Mint this article as an NFT
Not yet minted

Create a permanent, verifiable on-chain record of this article on the Scimatic Network. The NFT is held in your Journament account, and you can withdraw it to your own wallet at any time.

5 SUSD one-off · no wallet required
Sign in to mint
Abstract
Relative depth may be appreciated with the use of one eye using linear perspective, shadows, parallax and texture as monocular cues to depth. Stereopsis, on the other hand, is the direct appreciation of relative depth that requires the use of both eyes to construct a three-dimension-al percept from disparate two-dimensional retinal images. The advantage of stereopsis is with respect to complex visual tasks especially that requiring accurate hand-eye coordination. Tinted lenses are prescribed for a variety of reasons, including but not limited to photophobia, asthenopia, improving colour perception in colour deficient individuals, enhancing cosmesis and protection against glare or harmful radiation and enhancing visual performance as in sports. The aim of this study was to investigate the comparative effects of six specific CR39 tinted spectacle lenses (grade B), and a white CR39 lens, against a no lens condition, on stereoacuity over a range of illumination levels. Illumination was varied with the use of neutral density (ND) filters, while the Titmus Fly Stereotest (TFS) wasused to measure stereoacuity. Participants (n =60) between the ages of 17 - 29 years (mean =23.58; sd = 3.14) were purposively sampled from a clinical practice to participate in this research study.  Using repeated measures ANOVA and appropriate post-hoc multivariate analysis, it was evident that there was a significant decline in stereopsis as the level ofillumination decreased,regardless of tint condition; also there was no statistically significant difference in stereopsis between the no lens and white lens conditions at each level of illumination; and stereopsis wassignificantly superior with the no lens conditioncompared to all six other tint conditions (grade B), at each level of illumination. These results indicate that stereoacuity, as measured by the TFS, is adversely affected by a decline in retinal illuminance and by the use of tinted lenses. This information could be utilised to advise patients on the performance implications of the six tinted lenses tested with respect to their effects on stereoacuity under different illumination levels.
Reference Key
mehta2007africana Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;M. Mehta;P. Ramkissoon;A. M. Bhagwanjee
Journal computers in human behavior
Year 2007
DOI
10.4102/aveh.v66i1.199
URL
https://avehjournal.org/index.php/aveh/article/view/199
Keywords
ophthalmology

Citations

No citations found. To add a citation, contact the admin at info@scimatic.org

Comments

No comments yet. Be the first to comment on this article.