Quantification of phase retardation in corneal tissues using a femtosecond laser

William R. Calhoun III; Alexander Beylin; Richard Weiblinger; Ilko Ilev

doi:10.1117/12.2005954

26 March 2013 Quantification of phase retardation in corneal tissues using a femtosecond laser

William R. Calhoun III, Alexander Beylin, Richard Weiblinger, Ilko Ilev

Proceedings Volume 8567, Ophthalmic Technologies XXIII; 85672B (2013) https://doi.org/10.1117/12.2005954
Event: SPIE BiOS, 2013, San Francisco, California, United States

Abstract

The use of femtosecond lasers (FSL) in ophthalmic procedures, such as LASIK, lens replacement (cataract surgery), as well as several other treatments, is growing rapidly. The treatment effect is based on photo ablation of ocular tissues by a series of ultra-short laser pulses. However, the laser beam characteristics change dynamically due to interactions with birefringent corneal tissue, which may affect the outcome of the laser treatment. To better understand the effect the cornea has on the laser characteristics, we developed a system for measuring retardation and validated it with precise, standard phase retarders. Then we measured the phase retardation of FSLs through bovine corneas and found that there is a considerable, location dependent, variation in retardation values. This information can potentially help optimize FSL parameters to make their application in ophthalmic procedures safer and more effective.

Citation Download Citation

William R. Calhoun III, Alexander Beylin, Richard Weiblinger, and Ilko Ilev "Quantification of phase retardation in corneal tissues using a femtosecond laser", Proc. SPIE 8567, Ophthalmic Technologies XXIII, 85672B (26 March 2013); https://doi.org/10.1117/12.2005954

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