p. 145 - 153. Afonchyna N., Chyzh I. ADMISSIBLE ERRORS OF AMETROPY AND ASTIGMATISM MEASUREMENTS BY FOUCAULT'S MODIFIED METHOD Download
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N. Afonchyna., I. Chyzh
National Technical University of Ukraine 'Kyiv Polytechnical Institute', Kiev, Ukrane
ADMISSIBLE ERRORS OF AMETROPY AND ASTIGMATISM MEASUREMENTS BY FOUCAULT'S MODIFIED METHOD
This work is devoted to a substantiation of admissible errors of ametropy and astigmatism definition for the purpose of a formulation of requirements of the refractometer optical system designing which functions with use of the modified Foucault method. Using of two independent methods, namely geometrical and wave optics, admissible errors of eye refractometry measurements are found. On the basis of the conducted research the requirements to designing and parametrical optimization of refractometer optical system which functions on the basis of Foucault's modified method are proved. It is shown that hardware and mathematical algorithm of eye refractometry should provide no more than ±0,1D of ametropy definition and an ±0,2D of astigmatism definition. The correctness of the received results is confirmed by the comparative analysis of the defined measurement using of two independent methods.
Keywords: modified Foucalt method, admissible errors, ametropy, astigmatism
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