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Related Experiment Videos

Laser in situ keratomileusis for hyperopia.

D S Rosa, J L Febbraro

    Journal of Refractive Surgery (Thorofare, N.J. : 1995)
    |April 15, 1999
    PubMed
    Summary
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    Laser in situ keratomileusis (LASIK) for hyperopia shows good outcomes. A smaller ablation zone (5.5–8.25 mm) resulted in more predictable and stable visual results compared to larger zones.

    Area of Science:

    • Ophthalmology
    • Refractive Surgery

    Background:

    • Hyperopia treatment often involves refractive surgery.
    • Laser in situ keratomileusis (LASIK) is a common procedure for correcting refractive errors.

    Purpose of the Study:

    • To evaluate the impact of ablation zone size in LASIK on refractive and visual outcomes for hyperopia treatment.
    • To compare outcomes between different LASIK ablation zone sizes.

    Main Methods:

    • Retrospective analysis of 40 eyes (20 patients) undergoing LASIK for hyperopia.
    • Two groups were compared: Group 1 (5.5–9.0 mm ablation zone) and Group 2 (5.5–8.25 mm ablation zone).
    • Nidek EC-5000 excimer laser and Hansatome microkeratome were used; outcomes assessed over 6 months.

    Main Results:

    Related Experiment Videos

    • Six months post-LASIK, mean spherical equivalent refraction was +1.00 D (Group 1) and +0.75 D (Group 2).
    • One patient in Group 1 lost a line of spectacle-corrected visual acuity; no patients in Group 2 experienced vision loss.
    • Six patients gained 1-3 lines of spectacle-corrected visual acuity.

    Conclusions:

    • LASIK is effective for mild to moderate hyperopia.
    • A LASIK ablation zone of 5.5–8.25 mm demonstrated superior predictability and stability.
    • Corneal factors like diameter, flap thickness, and width are crucial for successful hyperopic LASIK.