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Linear-long incisions with a small optical zone for the correction of astigmatism in older patients.

AbstractPURPOSE:
To evaluate the efficacy of astigmatic keratotomy (AK) by paired linear (transverse)-long incisions within a small optical zone in older patients with 3.00 diopters (D) or more of astigmatism who are intolerant of contact lenses, spectacles, or both.
DESIGN:
Prospective, noncomparative case series.
PARTICIPANTS:
Twenty-one eyes (20 patients; age range, 58-87 years) treated at clinics of the Taipei Veterans General Hospital were included in this study.
METHODS:
Paired linear incisions (90 degrees in length) with a central optical zone (OZ) of 4.5 mm were made to correct high astigmatism in older patients. The incisions were 80% of the corneal thickness and parallel to the axis of the steepest cylinder.
MAIN OUTCOME MEASURES:
Refraction, keratometry, corneal topography, and visual acuity with and without correction were measured as the outcome indicators.
RESULTS:
The mean course of the stabilization of corneal curvature was 1.8 months. Significant improvement from a preoperative corneal astigmatism of 4.52+/-1.39 D to a postoperative value of 1.82+/-0.88 D (P<0.0001) was shown. Marked axis deviations of more than 30 degrees were observed in 5 cases and corneal perforation was observed in 1 case. When the corneal curvature stabilized, uncorrected visual acuity was improved by 2 lines or more in 15 eyes (71.4%). Spherical equivalents and best-corrected visual acuity did not change significantly. Postoperative glare was absent in all patients.
CONCLUSIONS:
We conclude that AK by linear-long incisions extending from a small OZ is effective and safe for correcting astigmatism.
AuthorsHui-Chun Ho, Ko-Hua Chen, Wen-Ming Hsu, Shui-Mei Lee, Chien-Cheng Chiang, Yen-Shien Li
JournalOphthalmology (Ophthalmology) Vol. 111 Issue 1 Pg. 28-33 (Jan 2004) ISSN: 0161-6420 [Print] United States
PMID14711710 (Publication Type: Journal Article)
Topics
  • Aged
  • Aged, 80 and over
  • Astigmatism (physiopathology, surgery)
  • Cornea (physiopathology, surgery)
  • Corneal Topography
  • Female
  • Humans
  • Male
  • Middle Aged
  • Ophthalmologic Surgical Procedures
  • Prospective Studies
  • Refraction, Ocular
  • Safety
  • Visual Acuity (physiology)

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