Related Experiment Videos
Effects of rigid lens flexure on vision
Journal of the American Optometric Association
|March 1, 1979
Summary
Rigid contact lenses thinner than 0.12 mm may flex on the eye. Newer rigid gas permeable materials flex more easily than older PMMA materials.
Area of Science:
- Ophthalmology and Optometry
- Materials Science
Background:
- Rigid contact lenses are used for vision correction.
- Lens material properties influence lens behavior on the eye.
Purpose of the Study:
- To evaluate the flexure of rigid contact lenses.
- To compare the flexure of different rigid lens materials.
Main Methods:
- Analysis of center thickness in rigid lenses.
- Comparison of material properties between PMMA and rigid gas permeable (RGP) materials.
Main Results:
- Rigid lenses with center thickness < 0.12 mm exhibit flexure.
- Rigid gas permeable materials demonstrate greater flexibility compared to Polymethyl methacrylate (PMMA).
Conclusions:
- Lens center thickness is a critical factor in rigid lens flexure.
- RGP materials offer increased flexibility, potentially impacting lens fit and performance.