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Am J Ophthalmol. 2002 Jul;134(1):115-7.

Effect of tear film break-up on higher-order aberrations measured with wavefront sensor.

Author information

  • 1Department of Ophthalmology, Suita, Japan.

Abstract

PURPOSE:

To investigate whether optical wavefront aberrations vary with tear film break-up.

DESIGN:

Observational case series.

METHODS:

Higher-order aberrations were examined for 20 eyes of 20 normal subjects with a Hartmann-Shack wavefront sensor before and after tear film break-up.

RESULTS:

Higher-order aberrations for photopic vision (central 4 mm diameter) after tear film break-up increased 1.44 fold compared to higher-order aberrations before tear film break-up (P =.001, paired t-test). Higher-order aberrations after tear film break-up for scotopic vision (central 6 mm diameter) were also 1.23 times higher than those before break-up (P =.005, paired t-test).

CONCLUSION:

Wavefront sensing enabled us to evaluate the induced irregular astigmatism caused by tear film break-up quantitatively. Wavefront aberrations should be measured carefully to avoid the effects of tear film break-up, especially in wavefront-guided refractive surgery.

PMID:
12095817
[PubMed - indexed for MEDLINE]
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