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Are optical aberrations during accommodation a significant problem for refractive surgery?

Pablo Artal·Enrique J Fernández·Silvestre Manzanera
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Abstract

PURPOSE: To study the limits to a perfect ideal customized wavefront correction due to the change of aberrations during accommodation. METHODS. We measured the dynamic changes of ocular aberrations during accommodation in normal eyes with a real-time Hartmann-Shack wavefront sensor. Those results were used in computer simulations to predict the benefit of a perfect customized correction. RESULTS: Due to the continuous changes of the aberrations over time, an ideal perfect static correction will not provide stable aberration-free optics. For example, when the eye accommodates to near objects, due to the changing aberrations, the eye will become aberrated again. An alternative correction using the aberration pattern for a slightly accommodated condition could provide a better-correction in a larger accommodative range, although at the cost of non-perfect correction for far vision. CONCLUSIONS: Due to the dynamic nature of ocular optics, a static perfect correction, for instance performed in customized refractive surgery, would not remain perfect for every condition occurring during normal accommodation.

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Accommodation, OcularCorneal TopographyDiagnostic Techniques, OphthalmologicalHumansRefraction, OcularRefractive ErrorsRefractive Surgical ProceduresVision, OcularVisual AcuityJournal ArticleResearch Support, Non-U.S. Gov't

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Pablo Artal, Enrique J Fernández, Silvestre Manzanera. Are optical aberrations during accommodation a significant problem for refractive surgery?. https://doi.org/10.3928/1081-597x-20020901-13

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