AI Article Synopsis

  • The study aimed to explore how tear film break-up affects optical wavefront aberrations in normal subjects.
  • Using a Hartmann-Shack wavefront sensor, researchers analyzed higher-order aberrations in 20 eyes before and after tear film break-up.
  • Results showed a significant increase in higher-order aberrations for both photopic and scotopic vision after tear film break-up, highlighting the importance of accounting for this when measuring wavefront aberrations for eye surgeries.

Article 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.

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Source
http://dx.doi.org/10.1016/s0002-9394(02)01430-7DOI Listing

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