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Related Experiment Videos

[Visual function in myopia 2 years after photorefractive keratectomy].

H Langrová1, D Hejcmanová, J Peregrin

  • 1Ocní klinika FN, Hradec Králové.

Ceska a Slovenska Oftalmologie : Casopis Ceske Oftalmologicke Spolecnosti a Slovenske Oftalmologicke Spolecnosti
|March 21, 2001
PubMed
Summary

Photorefractive keratectomy (PRK) outcomes show visual acuity and contrast sensitivity changes two years post-surgery. Myopes with moderate to high prescriptions experienced significant contrast sensitivity decline, indicating potential long-term visual effects.

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Area of Science:

  • Ophthalmology
  • Refractive Surgery
  • Visual Optics

Context:

  • Photorefractive keratectomy (PRK) is a common laser eye surgery for myopia correction.
  • Long-term visual outcomes, including best-corrected visual acuity (BCVA) and contrast sensitivity (CS), require further investigation.
  • Understanding refractive error progression and surgical outcomes is crucial for patient management.

Purpose:

  • To evaluate the long-term (2-year) effects of PRK on visual acuity and contrast sensitivity in myopic patients.
  • To compare outcomes across different degrees of myopia treated with PRK.
  • To assess visual performance under glare conditions post-PRK.

Summary:

  • 86 myopes (refractive error -0.25 D to -12.00 D) were grouped by severity and compared to 20 emmetropes over 2 years post-PRK.

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  • BCVA showed non-significant changes, increasing in mild, high myopia groups and decreasing in moderate myopia. CS decreased significantly in the moderate myopia group.
  • Regression occurred only in the moderate myopia group; 97% of patients had stable BCVA under glare.

    • Impact:

    • PRK outcomes vary by initial refractive error, with moderate myopia potentially experiencing long-term contrast sensitivity reduction.
    • Findings suggest the need for personalized post-PRK care, especially for patients with moderate myopia.
    • This study contributes to understanding the long-term visual function after PRK, informing surgical expectations and patient counseling.