Zernike phase spatial filter for measuring the aberrations of the optical structures of the eye

Svetlana N. Khonina (Login required)
Image Processing Systems Institute of the Russian Academy of Sciences, Samara, Russian Federation

Victor V. Kotlyar
Samara State Aerospace University, Russian Federation

Dmitriy V. Kirsh
Samara State Aerospace University, Russian Federation

Paper #2468 received 2015.05.29; revised manuscript received 2015.06.23; accepted for publication 2015.06.25; published online 2015.06.30.

DOI: 10.18287/jbpe-2015-1-2-146


To measure directly the wavefront aberration coefficients, we propose to use the multi-order diffractive element fitted with the set of Zernike polynomials. Polynomials of lowest degree describe defocusing (ametropy) and astigmatism. Coefficients of highest degree correspond to the spherical aberration of oblique rays that occurs as a consequence of misalignment of the crystalline lens and foveola, as well as deflection at the periphery of the crystalline lens. Multi-order elements allow several tens of expansions coefficients to be measured simultaneously, which will enable to investigate insufficiently known high-order aberrations for the differentiated diagnostics of eye diseases.


wavefront aberrations; eye optical system; Zernike polynomials; multi-order diffractive elements; expansion coefficients

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