Olga Svetlova
Department Ophthalmology of North-Western State Medical University named after I.I. Mechnikov, Russia
Title: Theory- Actuating mechanisms of accommodation and development of the theory of accommodation by Helmholtz
Biography
Biography: Olga Svetlova
Abstract
Theory- Actuating mechanisms of accommodation and development of the theory of accommodation by Helmholtz
1. Development Helmholtz theory of accommodation:
Basic Helmholtz of lens accommodation theory (HLAT) has stood the test of time [1]. However, the truth of accommodation was disclosed only in part, and on the basis of HLAT could not be attributed to a number of physiological and clinical facts. In particular, HLAT cannot explain facts partial ability to accommodation in the eyes with the artyphacia and aphacia. In addition, actuators in HLAT were not fully developed. Traditional views on the functioning of the single lens mechanism of accommodation on HLAT violate the laws of mechanics. It is believed that when you look "completely near" zonula fiber relaxed, but then in the eye do not have structures that hold the lens in position (fig. 1).
However, Helmholtz considered that when looking "totally near" the Zonula fiber did not relax but only weaken [8]. I.e. in all phases of accommodation the Zonula fiber is tight, and when vision nears the minimum, while vision distance maximum [9]. Our research has made it possible to develop basic HLAT, which for now is consistent with the laws of mechanics in all phases of accommodation [7-11]. Also we have been able to find many other additional mechanisms of accommodation [12].