Holembovskyi O. Refractometry of the pseudophakic eye with the measurement the depth of focus.

The dissertation is devoted to the research of methods of measuring residual refraction and the optical component of the volume of pseudo-accommodation of the pseudophakic and presbyopic eyes. The conducted review and analysis of existing subjective and objective methods of measurement to date showed that the main disadvantage of subjective methods is the disability to separate from the total volume of pseudo-accommodation that component, which is due solely to the effect of optics of the eye (optical component of the volume of pseudo-accommodation). Objective methods of definition can include the aberrometry of the eye with different methods of its hardware implementation. However, even with the use of a modern material and technical base, this method is not able to provide the necessary accuracy and speed, since it is indirect and additionally carries accumulated errors in the reconstruction of the wave aberration function. Based on the analysis it can be concluded that the existing methods for determining the residual ametropia and the optical component of the volume of pseudoacomodation do not fully satisfy the needs of modern ophthalmology, and therefore the actual task is to develop a new method and hardware that can solve the specified problem. Using an adequate physical model of optical system of the eye and the created photovoltaic model of the eye refractive meter, an experimental verification of the proposed method, hardware system and the theoretical positions obtained in the work, as well as the theoretically forecasted errors of reproduction of the refractive index and the depth of focus, were performed. It has been experimentally confirmed that the method allows measuring refraction with an error of not more than ± 0,1 dptr, and the volume of pseudoacomodation, corresponding to the depth of focus, with an error of not more than 0,2 dptr.