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Treatment of hyperopic astigmatism
C J Argento1, M J Cosentino, A Biondini
1Instituto de la Visión, Buenos Aires, Argentina.
Journal of Cataract and Refractive Surgery
|February 11, 1998
Summary
Laser-assisted in situ keratomileusis (LASIK) effectively treats hyperopic astigmatism. This laser vision correction procedure demonstrated good predictability and safety in correcting positive cylinder at the flattest meridian.
Area of Science:
- Ophthalmology
- Refractive Surgery
Background:
- Astigmatism, a common vision defect, can be treated with refractive surgery.
- Laser-assisted in situ keratomileusis (LASIK) is a popular surgical option for vision correction.
Purpose of the Study:
- To evaluate the outcomes of LASIK surgery for correcting positive cylinder at the flattest meridian.
- To analyze the safety and predictability of this LASIK approach for various types of hyperopic astigmatism.
Main Methods:
- A prospective, nonrandomized study involving 15 eyes with simple hyperopic astigmatism (SHA), 75 with compound hyperopic astigmatism (CHA), and 73 with mixed astigmatism (MA).
- LASIK treatment targeting the flattest meridian using the Chiron-Technolas Keracor 116/117 laser.
- Analysis of uncorrected visual acuity, best corrected visual acuity, refractive error correction, and visual acuity changes over time.
Main Results:
- Refractive cylinder was significantly reduced post-LASIK, with residual cylinder averaging +0.58 D (SHA), +0.12 D (CHA), and -0.11 D (MA) at six months.
- Good uncorrected visual acuities were achieved: 66.7% (SHA), 60.4% (CHA), and 76.5% (MA) attained 20/20 or 20/25 vision.
Conclusions:
- LASIK treatment of positive cylinder at the flattest meridian is predictable and safe for SHA, CHA, and MA.
- The procedure effectively corrected astigmatism without inducing hyperopic refractive shifts in the opposite meridian.