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Related Experiment Videos

Laser in situ keratomileusis for primary hyperopia.

George J C Jin1, W Andrew Lyle, Kevin H Merkley

  • 1The Eye Institute of Utah, Salt Lake City, Utah 84107, USA. georgejin@hotmail.com

Journal of Cataract and Refractive Surgery
|May 19, 2005
PubMed
Summary
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Hyperopic laser in situ keratomileusis (H-LASIK) is effective for correcting hyperopia, showing good visual outcomes and predictability. Topographic pseudokeratectasia (TPKE) was observed but did not impact results, suggesting a static condition.

Area of Science:

  • Ophthalmology
  • Refractive Surgery

Background:

  • Hyperopic laser in situ keratomileusis (H-LASIK) is a surgical option for correcting hyperopia.
  • Assessing long-term outcomes and potential topographic changes is crucial for understanding H-LASIK's safety and efficacy.

Purpose of the Study:

  • To evaluate the efficacy, predictability, stability, and safety of H-LASIK over 24 months.
  • To analyze topographic changes and assess the incidence of topographic pseudokeratectasia (TPKE) post-H-LASIK.

Main Methods:

  • Prospective study of 139 eyes undergoing H-LASIK for primary hyperopia.
  • Mean follow-up of 15.6 months, with 26% of eyes followed at 24 months.
  • TPKE defined as keratoconus screening findings with steepening, excluding corneal thinning or progression.

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Main Results:

  • Mean spherical equivalent improved from +2.39 D to -0.05 D.
  • 91% of eyes within +/-1.00 D of emmetropia; 71% within +/-0.50 D.
  • 42% achieved 20/20 uncorrected visual acuity; TPKE detected in 28%-56% without affecting outcomes.

Conclusions:

  • H-LASIK is an effective, predictable, and safe procedure for low to moderate hyperopia.
  • TPKE, a keratoconus-like pattern, may occur post-H-LASIK but appears static and does not compromise visual or refractive outcomes.