Excimer laser photorefractive keratectomy for hyperopia

Area of Science:

• Ophthalmology
• Refractive Surgery
• Excimer Laser Technology

Background:

• Excimer laser photorefractive keratectomy (PRK) is a recognized treatment for refractive errors, particularly myopia.
• Its efficacy in treating hyperopia, however, requires further prospective evaluation.

Purpose of the Study:

• To prospectively assess the efficacy, predictability, stability, and safety of excimer laser PRK for hyperopia treatment.
• To differentiate outcomes between low-moderate and high hyperopia groups.

Main Methods:

• Thirty-four hyperopic eyes underwent PRK using an Aesculap-Meditec (MEL 60) excimer laser.
• Patients were stratified into low-moderate (+1.50 to +6.00 D) and high (+6.25 to +9.75 D) hyperopia groups.
• Follow-up assessments were conducted at 1, 3, 6, and 12 months post-surgery.

Main Results:

• One-year follow-up data from 27 eyes showed 40% of the low-moderate group and 17% of the high hyperopia group achieved refractive error within +/- 1.00 D of emmetropia.
• Refractive stability was better in the low-moderate group, with some regression noted in the high hyperopia group up to 6 months.
• Postoperative uncorrected visual acuity of 20/40 or better was achieved in 67% of the low-moderate group versus 8% of the high hyperopia group. No vision-threatening complications occurred.

Conclusions:

• Excimer laser PRK is a safe and moderately effective option for low to moderate hyperopia (up to +6.00 D), with refractive stabilization typically occurring by 3 months.
• PRK is not considered a sufficiently effective or predictable treatment for high hyperopia based on these findings.