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Straylight As The Result Of Refractive Correction
Zoraida S Gaurisankar1, Gwyneth A van Rijn1, Gregorius Pm Luyten1
1Department of Ophthalmology, Leiden University Medical Center, Leiden, the Netherlands.
Clinical Ophthalmology (Auckland, N.Z.)
|December 10, 2019
Summary
Refractive correction with negative lenses slightly increases straylight (light scatter). High minus power contact lenses showed a subtle increase, but not enough to cause visual disability.
Area of Science:
- Ophthalmology
- Optometry
- Vision Science
Background:
- Straylight, or light scatter, can affect visual quality.
- Understanding how refractive correction influences straylight is crucial for optimizing visual performance.
Purpose of the Study:
- To investigate the impact of refractive correction, particularly negative lenses, on straylight levels.
- To assess whether different types of refractive correction (eyeglasses vs. contact lenses) affect straylight differently.
Main Methods:
- Straylight was measured using the C-Quant device in two groups: near-emmetropic eyes with negative lenses and myopic eyes with prescribed correction.
- Measurements were compared across various negative lens powers and between eyeglasses and contact lenses.
Main Results:
- In near-emmetropic eyes, each negative diopter added significantly increased straylight by 0.006 log-units (p<0.001).
- No significant correlation was found between the type of correcting lens (eyeglasses or contact lenses) and straylight values in myopic eyes.
Conclusions:
- Refractive correction using high minus power contact lenses can lead to a minor increase in straylight.
- These observed changes in straylight are subtle and unlikely to cause clinically significant visual impairment.
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