Interferometric analysis of the ablation profile in refractive surgery

M. I. Rodríguez-Rodríguez; E. López-Olazagasti; M. A. Rosales; G. Ramírez-Zavaleta; R. Cantú; E. Tepichín

doi:10.1117/12.795501

11 August 2008 Interferometric analysis of the ablation profile in refractive surgery

M. I. Rodríguez-Rodríguez, E. López-Olazagasti, M. A. Rosales, G. Ramírez-Zavaleta, R. Cantú, E. Tepichín

Proceedings Volume 7064, Interferometry XIV: Applications; 70640W (2008) https://doi.org/10.1117/12.795501
Event: Optical Engineering + Applications, 2008, San Diego, California, United States

Abstract

In ophthalmology, the laser excimer corneal surface ablation used to correct the refractive eye defects, such as myopia, astigmatism and hyperopia and, more recently, presbyopia is known as refractive surgery. Typically, the characterization of the corresponding technique, as well as the laser accuracy, is performed by analyzing standard ablation profiles made on PMMA (polymethylmethacrylate) plates. A drawback of this technique is that those plates do not necessarily represent the dimensions of the cornea during the ablation. On the other hand, due to the time varying process of the eye aberrations, the direct eye refractometric measurements can produce some errors. We report in this work the interferometric analysis of the ablation profile obtained with refractive surgery, applied directly on a contact lens. In this case, the resultant ablation profile might be closer to the real profile as well as time invariant. We use, as a reference, a similar contact lens without ablation. The preliminary results of the characterization of the corresponding ablation profile are also presented.

Citation Download Citation

M. I. Rodríguez-Rodríguez, E. López-Olazagasti, M. A. Rosales, G. Ramírez-Zavaleta, R. Cantú, and E. Tepichín "Interferometric analysis of the ablation profile in refractive surgery", Proc. SPIE 7064, Interferometry XIV: Applications, 70640W (11 August 2008); https://doi.org/10.1117/12.795501

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KEYWORDS

Interferometry

Eye

Surgery

Laser ablation

Polymethylmethacrylate

Contact lenses

Laser vision correction

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