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Related Experiment Videos

Higher-order wavefront aberrations in corneal refractive therapy.

Charlotte E Joslin1, Shelley M Wu, Timothy T McMahon

  • 1Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, 1855 W. Taylor St., Suite 3.164, Chicago, IL 60612, USA. charjosl@uic.edu

Optometry and Vision Science : Official Publication of the American Academy of Optometry
|December 23, 2003
PubMed
Summary

Corneal Refractive Therapy (CRT) for myopia correction significantly increased higher-order ocular wavefront aberrations, particularly spherical aberration. This finding is crucial for understanding the visual quality changes associated with CRT treatment.

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Area of Science:

  • Ophthalmology
  • Optometry
  • Vision Science

Background:

  • Myopia affects a significant portion of the global population.
  • Corneal Refractive Therapy (CRT) is a non-surgical method for myopia correction using specialized contact lenses.
  • Understanding the impact of CRT on ocular optics is essential for patient outcomes.

Purpose of the Study:

  • To evaluate the effect of Corneal Refractive Therapy (CRT) on higher-order ocular wavefront aberrations.
  • To quantify changes in third through sixth-order aberrations after CRT treatment.
  • To identify specific aberrations most affected by CRT.

Main Methods:

  • Eighteen myopic eyes were treated with CRT lenses.
  • Ocular wavefront aberrations were measured using a Shack-Hartmann aberrometer at baseline and after one month.

Related Experiment Videos

  • Zernike coefficients were analyzed to calculate higher-order aberrations for 3-mm and 6-mm pupil sizes.

    • Main Results:

    • CRT effectively reduced myopia, with a mean reduction of 3.08 D.
    • A statistically significant increase in higher-order aberrations was observed for both 3-mm (2.66x) and 6-mm (2.50x) pupils.
    • Spherical aberration (Z40) showed the most substantial increase, rising from 0.084 to 0.39 micrometers for 6-mm pupils.

    Conclusions:

    • Corneal Refractive Therapy (CRT) treatment leads to an increase in higher-order wavefront aberrations.
    • Spherical aberration (Z40) is particularly affected by CRT lens wear.
    • These optical changes may influence visual quality and require further investigation.