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Three year results of refractive keratotomy using the Casebeer System
Journal of Cataract and Refractive Surgery
|October 1, 1996
Summary
Refractive keratotomy using the Casebeer system achieved 96% of patients with 20/40 vision or better. However, 36% of patients needed enhancements, and hyperopic shift was a concern.
Area of Science:
- Ophthalmology
- Refractive Surgery
- Corneal Surgery
Background:
- Refractive keratotomy (RK) aims to correct myopia.
- The Casebeer nomogram system is a method used in RK.
Purpose of the Study:
- To analyze the outcomes of a single surgeon's initial refractive keratotomy procedures.
- Evaluate the efficacy and safety of RK using the Casebeer system.
Main Methods:
- A retrospective analysis of 241 consecutive RK procedures (128 patients) was performed.
- Data from 3-year follow-up were examined, with an average preoperative myopia of -4.07 D.
- The Casebeer nomograms were utilized for surgical planning.
Main Results:
- At 3 years, the mean residual refractive error was -0.04 D (manifest) and +0.45 D (cycloplegic).
- 96% of eyes achieved uncorrected visual acuity of 20/40 or better.
- 36% of eyes required 1-6 enhancement procedures; 4% lost best-corrected acuity lines.
Conclusions:
- The Casebeer system for RK can yield good uncorrected visual acuity (96% 20/40 or better) for low to moderate myopia.
- A significant rate of enhancement procedures (36%) was necessary.
- Hyperopic shift is a notable complication after RK.
