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Excimer laser treatment for high and extreme myopia. The Melbourne Excimer Laser and Research Group.

AbstractOBJECTIVE:
The excimer laser allows the controlled ablation of corneal tissue to correct refractive error. We assessed the efficacy of excimer laser treatment for persons with high (spherical equivalent between -5 and -10 diopters) and extreme (spherical equivalent greater than -10D) myopia.
METHODS:
Patients were assessed 1, 3, and 6 months postoperatively. A VisX Twenty/Twenty laser was used. Visual acuity, refraction, corneal clarity, and adverse reactions were evaluated at each visit.
RESULTS:
Six month follow-up data were available for 194 high myopes and 53 extreme myopes. Postoperative healing was similar for the two groups. Six months postoperatively, 89.2% of high myopes and 49% of extreme myopes were within 2D of planned refraction. At 6 months, 28% of high myopes had an uncorrected visual acuity of 20/20 and 71% had an uncorrected visual acuity of 20/40. Of extreme myopes, 4% had an uncorrected visual acuity of 20/20 and 30% had an uncorrected visual acuity of 20/40. Significantly more corneal haze was observed in the extreme myopes. Loss of 2 or more lines of best corrected visual acuity was observed in 13% of high myopes and 13% of extreme myopes at 6 months.
CONCLUSIONS:
Excimer laser photorefractive keratectomy is an alternative means of treating high and extreme myopia and can cause a significant reduction in myopia. There is a need to gather further information as more patients are followed up for greater time.
AuthorsC A Carson, H R Taylor
JournalArchives of ophthalmology (Chicago, Ill. : 1960) (Arch Ophthalmol) Vol. 113 Issue 4 Pg. 431-6 (Apr 1995) ISSN: 0003-9950 [Print] UNITED STATES
PMID7710391 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
Topics
  • Adult
  • Aged
  • Astigmatism (etiology)
  • Cornea (physiology, surgery)
  • Female
  • Follow-Up Studies
  • Humans
  • Laser Therapy (adverse effects)
  • Male
  • Middle Aged
  • Myopia (classification, physiopathology, surgery)
  • Postoperative Complications
  • Prognosis
  • Refraction, Ocular
  • Visual Acuity

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