REASONING OF THE MOST DISTINCT VISION DISTANCE

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REASONING OF THE MOST DISTINCT VISION DISTANCE

Journal Title: ФІЗИКО-МАТЕМАТИЧНА ОСВІТА - Year 2018, Vol 15, Issue 1

Abstract

Examines the reasons for the establishment of most distinct vision distance. It is shown that in textbooks on physics and Biophysics there is a full explanation of this concept. It is proved that the blur of the point image on the retina decreases when removing points from the eyes and practically stops its decrease, when the deletion reaches about 10 cm taking into account calculations for the phenomenon of the spherical surface refraction neuraxial rays. The conclusion that the most clear distance vision is the optimal distance that a valid low when a good enough linear resolution and, at the same time large enough to form images of paraxial rays. The three major ideas concerning this problem are distinguished: The lens equation for nonparaxial ray are found. It is shown that even in the case of unlimited re duking ability of focal length of human eye crystalline lens, the vision will not be perfect because refraction nature of spherical surface for nonparaxial rays. If an object is located too close to the eye, then image is formed by nonparaxial rays giving a lot images on the retina of each point of the object. As the result, the image is blurred. If an object is too far from the eye, another problem appears: liner resolution decreases, so the images of different points of the object join into one point. It is shown that existence of the most distinct vision distance due to not biology nature of the human eye but only physics nature of spherical surface refraction and circular aperture diffraction.

Authors and Affiliations

Yu. O. Uhryn, V. B. Brytan, M. V. Trembetskyi

Keywords

the most clear distance vision. linear resolution. angular resolution. paraxial beam. separately beam

EP ID EP475265
DOI 10.31110/2413-1571-2018-015-1-020
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