The refractive behaviour of the human eye under different ambient lighting conditions
African Vision and Eye Health
| Field | Value | |
| Title | The refractive behaviour of the human eye under different ambient lighting conditions | |
| Creator | Metsing, Thokozile I. Carlson, Anthony | |
| Description | Background: Adjustment of the ocular accommodative system is an important phenomenon allowing for optimal vision at different distances.Aim: The study compared the refractive behaviour of the human eye under different ambient lighting conditions for different target brightness.Setting: Auto-refraction measurements were taken of the participants in the Department of Optometry at the University of Johannesburg.Methods: Five African participants from a single ethnic group aged between 20 years and 25 years, had 40 successive auto-refractor (Nidek AR 610) measurements taken on the right eye of each participant in a bright and dark room using the illuminated and dark targets (LL and DL); dark target in the illuminated and dark room (LD and DD).Results: A change in the refractive state of all participants was observed on LL and LD, except for one, who experienced myopic shifts. The largest significant difference in the variance-covariances and the means was approximately 2.40 dioptre (D). The other participants’ shifts in means were approximately the same and varied between 1.00 D and 1.50 D stigmatic shift. For the DL to DD conditions all participants, except for one, underwent a hyperopic shift of about 0.50 D.Conclusion: The refractive behaviour of the human eye appears to be dependent on ambient light conditions as well as target illumination or luminance.Contribution: The study is scientific and clinical, and focuses on changes in refractive behaviour under different lighting conditions, falling within the scope of the journal. Key insights are that there is a change in the refractive behaviour of the eye under different ambient conditions. | |
| Publisher | AOSIS | |
| Date | 2023-09-28 | |
| Identifier | 10.4102/aveh.v82i1.839 | |
| Source | African Vision and Eye Health; Vol 82, No 1 (2023); 7 pages 2410-1516 2413-3183 | |
| Language | eng | |
| Relation |
The following web links (URLs) may trigger a file download or direct you to an alternative webpage to gain access to a publication file format of the published article:
https://avehjournal.org/index.php/aveh/article/view/839/2209
https://avehjournal.org/index.php/aveh/article/view/839/2210
https://avehjournal.org/index.php/aveh/article/view/839/2211
https://avehjournal.org/index.php/aveh/article/view/839/2212
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