June 2013
Volume 54, Issue 15
Free
ARVO Annual Meeting Abstract  |   June 2013
Modeling of Human Refractions for Refractive Surgery
Author Affiliations & Notes
  • Guang-ming Dai
    R & D, Abbott Medical Optics, Milpitas, CA
  • Footnotes
    Commercial Relationships Guang-ming Dai, Abbott Medical Optics (E)
  • Footnotes
    Support None
Investigative Ophthalmology & Visual Science June 2013, Vol.54, 3132. doi:https://doi.org/
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      Guang-ming Dai; Modeling of Human Refractions for Refractive Surgery. Invest. Ophthalmol. Vis. Sci. 2013;54(15):3132. doi: https://doi.org/.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Purpose: To investigate the statistical distribution of sphere and cylinder for refractive surgical candidates.

Methods: Based on population statistics for 393,139,704 eyes in a 2006 national survey and a refractive surgery patient database for 8,246,757 eyes performed in the US until 2006, a statistical analysis was performed. For refractive sphere, a normal distribution is a reasonable measure for virgin eyes. For refractive surgical candidates, however, a Rayleigh distribution better represents the statistics as emmetropic patients do not seek refractive surgery (except for presbyopes). For refractive cylinder, a normal distribution is a reasonable measure for both the virgin eyes and refractive surgical candidates. These statistical models were used to generate random eyes for scientific research or commercial use.

Results: One million random normal eyes and one million refractive surgical eyes were generated based on the proposed algorithms. Roughly 79% eyes are myopic, 13% are hyperopic and 7% are mixed astigmatic. The statistics of the simulated eyes follow the statistics assumed. This allows a “real-world” testing, or a “simulated clinical trial” for the development of new treatment algorithms, or verification and validation of to-be-released treatment software products, greatly speeds up the process and improves the efficiency for product development in a commercial environment. It may also be used in the vision research when a large number of eyes are required for statistical analysis.

Conclusions: The refractions of human eyes (sphere and cylinder) follow the proposed statistical distribution based on a large national optometric database. Simulation based on the statistics provides a useful means for vision research and commercial use.

Keywords: 678 refractive surgery • 676 refraction • 473 computational modeling  
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