Posters

A new approach of cues related with accommodation

Poster Details

First Author: J.Esteve-Taboada SPAIN

Co Author(s):    M. Aloy   P. Mimica   J. Adsuara   R. Montes-Mico           

Abstract Details

Purpose:

During the last years it has been suggested that the human eye can determine the defocus sign without retroalimentation despite it is unknown the optical cues that are related in this process. This work aimed to analyse the existence of a possible mechanical cue, not optical, that can be related in this process providing information about the defocus sign

Setting:

University of Valencia, Spain.

Methods:

We analyse the existence of a mechanical signal that can be transmitted from the crystalline lens, changing its morphology during the accommodative process, to the retina, providing the change in the accommodative state of the eye. We have applied well-know techniques of gravitational waves used in computational astrophysics, exploring the analogy between accommodation of the human eye with the deformation of compact stellar objects that induce the emission of gravitational waves

Results:

We have developed a simplified model of the human eye that, in the first approximation, considers an isotropic and homogeneous sphere with the known elastic properties of the eye. For the characterization of the model we have evaluated exact theoretical models based on the combination of four refractive surfaces, including both model that allow parametrize the capability of accommodate of the human eye and models that simulate only the visual system in conditions of specific vergence. We have used the analytical outcomes for oscillations detectors of gravitational wave on this simplified model eye, and we have obtained the normal modes of vibration for small perturbations.

Conclusions:

We have analysed the normal modes of vibration in a simplified human eye model that considers an isotropic and homogeneous sphere with the known elastic properties of the eye. This model allows to analyse the possible existence of a mechanical signal that can be transmitted from the crystalline lens to the retina, providing then the change in the accommodative status of the human eye.

Financial Disclosure:

NONE