Laser in situ keratomileusis for the correction of hyperopia from +0.50 to +11.50 diopters with the Keracor 117C laser.

Abstract

PURPOSE:

To evaluate excimer laser in situ keratomileusis (LASIK) for the correction of hyperopia.

METHODS:

We reviewed retrospectively the medical records of 46 patients treated with LASIK for hyperopia. All patients had a complete ophthalmologic evaluation. The corneal bed was ablated using the Bausch & Lomb Chiron Keracor 117C excimer laser to create a paracentral annular ablation under a nasally hinged 160-microm corneal flap with the Chiron Automatic Corneal Shaper microkeratome. Follow-up was a minimum of 6 months.

RESULTS:

Eighty eyes of 46 patients (23 males and 23 females) were included. Age ranged from 18 to 65 years (mean, 42 yr). The range of preoperative spherical equivalent refraction was +0.50 to +11.50 D (mean, +3.40 D). Mean postoperative spherical equivalent refraction at 6 months was +0.26 D. Six months after surgery, 35 eyes (44%) achieved uncorrected visual acuity of 20/20 or better and 78 eyes (97.5%) achieved 20/40 or better. Forty-six eyes (58%) had a postoperative spherical equivalent refraction within +/-0.50 D of attempted correction, and 67 eyes (84%) were within +/-1.00 D of attempted correction. When using the Bausch & Lomb Chiron Keracor 117C excimer laser to correct hyperopia, eyes with a spherical equivalent refraction less +2.00 D should be overcorrected by 25%, +2.00 to +4.00 D by 30%, and over +4.00 by 40%. The positive cylinder should be overcorrected by 10%.

CONCLUSIONS:

LASIK was safe and effective in the treatment of hyperopia from +0.50 to +11.50 D. Regression following LASIK for hyperopia remains a problem. A special nomogram was required to achieve results comparable with those for myopia.

• Authors: K F Tabbara, H F El-Sheikh, S M Islam
• Journal: Journal of refractive surgery (Thorofare, N.J. : 1995) (J Refract Surg) 2001 Mar-Apr Vol. 17 Issue 2 Pg. 123-8 ISSN: 1081-597X [Print] United States
• PMID: 11310761 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Topics

• Adolescent
• Adult
• Aged
• Corneal Stroma (physiopathology, surgery)
• Female
• Humans
• Hyperopia (physiopathology, surgery)
• Keratomileusis, Laser In Situ (methods)
• Male
• Middle Aged
• Refraction, Ocular (physiology)
• Retrospective Studies
• Safety
• Surgical Flaps
• Treatment Outcome
• Visual Acuity (physiology)