In vivo increase of the human lens equatorial diameter during accommodation

• DOI: 10.1152/ajpregu.1996.271.3.r670
• Publication Date: 2017-12-24T23:47:16Z
• Authors: R. A. Schachar; C. Tello; D. P. Cudmore; J. M. Liebmann; T. D. Black; R. Ritch
• Keywords: Through-the-lens metering

The movement of the human lens equator during accommodation was examined in vivo. High-resolution ultrasound images were obtained from young subjects whose amplitude controlled with 1% tropicamide and 2% pilocarpine. To avoid errors that otherwise arise eye rotation or other movement, cornea sclera used as positional references comparative studies video unaccommodated accommodated states. During accommodation, at involved small displacement; i.e., < 100 microns, did not move anteriorly posteriorly but peripherally toward sclera. These results indicate is under increased zonular tension contradiction to Helmholtz's widely accepted theory accommodation.