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curt
what you are describing is called "intracorneal rings" and they are currently in phase 3 trials in the united states, in other words they are about to be approved for use. they are for low to moderate degrees of
nearsightednessCorneal surgery
Nearsightedness, and not astigmatism. yes, they have the theoretical advantage that they can be removed and replaced. they seem a promising alternative to
LASIKLasik eye surgery - series or PRK. you may find more information at Eyenet.org, which is the american academy of ophthalmology website.
Disclaimer
This information is provided for general medical education purposes only. Please consult your physician for diagnostic and treatment options pertaining to your specific medical condition.