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Correlation of aberrations with visual acuity and symptoms
Maria Regina Chalita1, Ronald R Krueger
1Department of Ophthalmology, Federal University of Sao-Paulo, Brazil. mrchalita@pobox.com
Ophthalmology Clinics of North America
|June 23, 2004
Summary
Standard refractive surgery, like photorefractive keratectomy and laser in situ keratomileusis, can alter eye
Area of Science:
- Ophthalmology
- Optical Engineering
- Vision Science
Background:
- Standard refractive surgeries, including photorefractive keratectomy (PRK) and laser in situ keratomileusis (LASIK), are common procedures to correct vision.
- These procedures aim to reshape the cornea to improve refractive error but can induce changes in the eye's optical system.
Observation:
- Refractive surgery alters the eye's wavefront aberrations, particularly inducing higher-order aberrations such as spherical aberration and coma.
- Wavefront sensing technology allows for precise measurement of these optical changes post-surgery.
Findings:
- Post-refractive surgery, a decrease in low-contrast visual acuity and contrast sensitivity is frequently observed.
- These optical changes significantly impact a patient's night vision, leading to visual disturbances.
Implications:
- Patients may experience symptoms like halos, starbursts, and glare, especially in low-light conditions.
- Understanding induced aberrations is crucial for improving surgical outcomes and patient satisfaction.
- Further research into mitigating higher-order aberrations could enhance the quality of vision after refractive surgery.