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Age-related refractive shifts in simple myopia
K L Ellingsen1, A Nizam, B A Ellingsen
1Spokane Eye Clinic, Spokane, Washington, USA.
Summary
Adults with simple myopia exhibit varying refractive stability. Some maintain stable vision, while others experience significant shifts, particularly a hyperopic shift after radial keratotomy surgery.
Area of Science:
- Ophthalmology
- Refractive Error Research
- Longitudinal Studies
Background:
- Understanding age-related refractive shifts is crucial for refractive surgeons.
- This study examines the refractive stability in adult simple myopia.
- 413 eyes were retrospectively analyzed.
Purpose of the Study:
- To characterize the refractive stability of adult simple myopia.
- To compare refractive shifts in simple myopia with outcomes of radial keratotomy.
- To inform surgical planning and patient counseling for refractive procedures.
Main Methods:
- Analysis of approximately 74,000 patient records.
- Identification of 208 adults with myopia (-1.00 to -6.00 D) followed for over 20 years.
- Quantification and analysis of myopic and hyperopic shifts, with comparison to radial keratotomy data.
Main Results:
- Mean age-related refractive shifts observed: -0.60 D (20s), -0.39 D (30s), -0.29 D (40s), +0.28 D (50s), +0.41 D (60s).
- Prospective Evaluation of Radial Keratotomy (PERK) study data showed increasing hyperopic shifts post-surgery up to age 50.
- Adult simple myopia population exhibits diverse refractive stability patterns.
Conclusions:
- Adults with simple myopia are not a monolithic group regarding refractive stability.
- Subgroups exist with significant refractive shifts, distinct from the general population.
- Hyperopic shifts post-radial keratotomy may be surgically induced and potentially underestimated.