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Corneal thickness changes with extended contact lens wear
American Journal of Optometry and Physiological Optics
|October 1, 1980
Summary
Continuous wear of Permalens contact lenses caused initial corneal swelling in myopic patients, which generally resolved over time. However, individual responses varied, with some experiencing chronic corneal thickening or thinning after 18 months.
Area of Science:
- Ophthalmology
- Optometry
- Corneal Physiology
Background:
- Continuous wear contact lenses offer convenience but may impact corneal health.
- Understanding long-term corneal response to extended wear is crucial for patient safety.
Purpose of the Study:
- To evaluate corneal thickness changes in myopic patients during 18 months of continuous Permalens contact lens wear.
Main Methods:
- Eight myopic patients were enrolled.
- Corneal thickness was measured over an 18-month period.
- Continuous wear of Permalens contact lenses was maintained.
Main Results:
- Averaged data showed maximum corneal swelling after one week.
- Corneal thickness generally returned to near baseline levels over time.
- Significant individual variations in corneal thickness response were observed, including chronic thickening and thinning.
Conclusions:
- While Permalens contact lenses may not cause persistent edema on average, individual variability in corneal response is significant.
- Long-term monitoring is essential to detect potential chronic corneal changes associated with continuous wear contact lenses.