Study on the modification of measured wavefront aberration data for customized visual correction

Ming Liu; Yong Zhang; Zhidong Zhang; Wei Quan; Li An

doi:10.1117/12.821437

6 March 2009 Study on the modification of measured wavefront aberration data for customized visual correction

Ming Liu, Yong Zhang, Zhidong Zhang, Wei Quan, Li An

Proceedings Volume 7280, Seventh International Conference on Photonics and Imaging in Biology and Medicine; 72802J (2009) https://doi.org/10.1117/12.821437
Event: Photonics and Optoelectronics Meetings, 2008, Wuhan, China

Abstract

Wavefront aberration of human eye is an important foundation for customized vision correction. In most current aberrometers, near infrared light is used to measure ocular wavefront aberration, whereas for customized visual correction, wavefront aberration data in visible range are required. With the measured wavefront aberration, corneal topography and eye's axial lengths data, individual eye models for twenty normal human eyes are constructed with the optical design software ZEMAX. Changing the incidence light wavelength and the refractive indexes of eye models, the values of defocus, astigmatism, higher-order aberrations in the measuring wavelength (833nm) and at the most sensitive wavelength of human eye (555nm) are obtained. Average focus shift between 833nm and 555nm is found to be about 0.94D, and different slightly for different individuals; the differences of astigmatism and higher-order aberrations between 833nm and 555nm are quite slight. For customized visual correction, the measured defocus value should be modified, whereas the measured astigmatism and higher-order aberrations could be used directly for the current correction precision. Individual eye model is a useful tool for accurate transformation of the measured wavefront aberration data into the data for visible spectrum.

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Ming Liu, Yong Zhang, Zhidong Zhang, Wei Quan, and Li An "Study on the modification of measured wavefront aberration data for customized visual correction", Proc. SPIE 7280, Seventh International Conference on Photonics and Imaging in Biology and Medicine, 72802J (6 March 2009); https://doi.org/10.1117/12.821437

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KEYWORDS

Wavefront aberrations

Eye

Eye models

Infrared radiation

Monochromatic aberrations

Crystals

Visible radiation

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