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Proceedings Paper

Aberration mapping for sight correction
Author(s): Vasyl V. Molebny; Vitalij N. Kurashov; Dmitrij V. Podanchuk; Andry V. Kovalenko; Ioannis G. Pallikaris; Leonidas P. Naoumidis
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Paper Abstract

In sight correction technologies, it is of extreme importance to know what outcome of the planned operation could be. Conventionally, cornea shape is measured, or even refraction distribution in the eye, that are used for calculations of the to-be-ablated cornea layers. Unfortunately, different obstacles could arise, involving errors in these calculations. We propose another approach of measuring the to-be-inserted aberrations that would compensate for existing aberrations to get maximal sight acuity. The approach is based on measurements of wave front aberrations at the exit of an eye and iterative procedure of phase conjugation of the wave front, entering the eye. As a result of the procedure, an optimized point spread function is achieved. Shack-Hartmann sensors are used for wave front measurements, and spatial modulators -- for wave front control. Local slopes of wave front being measured, Wiener-type filtering helps to reconstruct the wave front itself. The results are reported of single-pass and double-pass modeling with experimental setup and computer simulation.

Paper Details

Date Published: 1 June 1998
PDF: 11 pages
Proc. SPIE 3246, Ophthalmic Technologies VIII, (1 June 1998); doi: 10.1117/12.309428
Show Author Affiliations
Vasyl V. Molebny, Institute of Biomedical Engineering (Ukraine)
Vitalij N. Kurashov, Institute of Biomedical Engineering (Ukraine)
Dmitrij V. Podanchuk, Institute of Biomedical Engineering (Ukraine)
Andry V. Kovalenko, Institute of Biomedical Engineering (Ukraine)
Ioannis G. Pallikaris, Vardinoyannion Eye Institute of Crete/Univ. of Crete Medical School (Greece)
Leonidas P. Naoumidis, Vardinoyannion Eye Institute of Crete/Univ. of Crete Medical School (Greece)


Published in SPIE Proceedings Vol. 3246:
Ophthalmic Technologies VIII
Pascal O. Rol; Karen Margaret Joos; Fabrice Manns, Editor(s)

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