Theoretical study of aberration correction in eyes using scanning-spot lasers

M. Arif, David Huang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Purpose: To investigate the effect of laser spot size on the outcome of aberration correction with scanning laser corneal ablation. Methods: Numerical simulation of ablation outcome. Results: Correction of aberrations of Zernike modes from second to 8th order were simulated. Gaussian and top-hat beams of 0.6 to 2.0 mm full-width-half-maximum diameters were modeled. The fractional correction and secondary aberration (distortion) were evaluated. Using a distortion/correction ratio of less than 0.5 as a cutoff for adequate performance, we found that a 2 mm or smaller beam is adequate for spherocylindrical correction (Zernike second order), a 1 mm or smaller beam is adequate for correction of up to 4th order Zernike modes, and a 0.6 mm or smaller beam is adequate for correction of up to 6th order Zernike modes. Conclusions: Since ocular aberrations above Zernike 4th order are relatively insignificant, current scanning lasers with a beam diameter of 1 mm or less are theoretically capable of eliminating most of the higher order aberrations of the eye.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsF. Manns, P.G. Soderberg, A. Ho
Pages66-77
Number of pages12
Volume4245
DOIs
Publication statusPublished - 2001
Externally publishedYes
EventOphthalmic Technologies XI - San Jose, CA, United States
Duration: Jan 20 2001Jan 21 2001

Other

OtherOphthalmic Technologies XI
CountryUnited States
CitySan Jose, CA
Period1/20/011/21/01

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Keywords

  • Customized corneal ablation
  • Laser vision correction
  • LASIK
  • Optical aberration
  • PRK
  • Supernormal vision

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Arif, M., & Huang, D. (2001). Theoretical study of aberration correction in eyes using scanning-spot lasers. In F. Manns, P. G. Soderberg, & A. Ho (Eds.), Proceedings of SPIE - The International Society for Optical Engineering (Vol. 4245, pp. 66-77) https://doi.org/10.1117/12.429291