Overcorrection (hyperopia)
Overcorrection makes an eye that was nearsighted before surgery farsighted (hyperopia) after surgery. Overcorrection speeds up the start of presbyopia. Most people who have overcorrection will need reading glasses before age 40. Improvements in surgical techniques are reducing the risk of overcorrection.
Surgery to correct overcorrection is possible, but it is hard to predict how well it will work.
With radial keratotomy (RK) surgery, the percentage of people who are overcorrected or farsighted seems to increase as more time (years) passes after the procedure. These changes over time are believed to be caused by the hyperopic shift. The hyperopic shift is less common in people who have had photorefractive keratectomy (PRK) or LASIK surgery.
| Author: | Robin Parks, MS | Last Updated: July 7, 2007 |
| Medical Review: | Kathleen Romito, MD - Family Medicine Carol L. Karp, MD - Ophthalmology | |
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