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V I Bystritskiĭ

Publications and source records attributed to V I Bystritskiĭ.

6 recordsLinked to original sources
PubMedDate not supplied

[Accommodation].

Based on the literature data and his own findings the author makes an attempt to specify the accommodation mechanism, particularly hyaloid effect on the lens in the course of accommodation. It is believed, and the author presents experimental data in favor of this assumption, that in youth the lens and hyaloid represent a single optic complex. The lens sealed in the cup-like depression of the vitreous body cannot be mobile in relation to the hyaloid and cannot acquire a more convex shape by itself at the height of accommodation. Moreover, experiments have proved that at the height of accommodation, according to many authors' data, the posterior pole of the lens is shifted towards the hyaloid to a distance of 0.16 to 0.27 mm, which the lens surely cannot do by itself. The hyaloid making rotatory movements at the height of accommodation, it is evident that the lens in this case passively follows the hyaloid and acquires an aspherical shape only under its effect. The ciliary belt plays but a secondary role in this process, being just a buffer.

Accommodation, Ocular↗
PubMedDate not supplied

[The Pau phenomenon and complex movements of hyaloid in aphakic eyes].

The author analyzed complex movements of the hyaloid at the height of the ciliary muscle contraction in 121 aphakic eyes. He came to a conclusion that hyaloid dislocation is an active process realized by the ciliary muscle in the course of its contraction. Hyaloid and the vascular coating, on the one hand, and the ciliary muscle, on the other, were shown to be antagonists. Atropine in instillations paralysed the whole muscle, and it was impossible then to detect the predominance of Brücke's muscle over Muller's one. Adrenalin instillations after Gredle or subconjunctivally did not stimulate the contractions of Brücke's muscle, but only those of the vascular coating, for the effects of adrenalin on vascular walls are well known. As for the double innervation of accommodation, it is a fact undeniable, which only confirms that sympathetic innervation performs a trophic function in any tissue, and in the ciliary muscle as well as anywhere else.

Accommodation, Ocular↗