|
KMID : 1011420100150030235
|
|
Journal of Korean Ophthalmic Optics Society
2010 Volume.15 No. 3 p.235 ~ p.240
|
|
|
Analysis and Design of an Accommodation-Dependent Eye Model Based on Navarro Model
|
|
Kang Eun-Kyoung
Park Sung-Chan
Kim Jin-Joo
Hwangbo Chang Kwon
|
|
|
Abstract
|
|
|
Purpose: In this study, we proposed a simple accommodation-dependent crystalline lens with a constant volume and homogeneous refractive index.
Methods: We proposed a human crystalline lens with two aspheric surfaces. Two surfaces intersect in two points and straight line between two points was equator(2b). It assumed that the derivative in axial direction was zero at the equator and the radial derivative was zero at the vertex. Proposed human crystalline lens was divided by the equator into the anterior and posterior parts. It was assume that the volume of each part and refractive index of the human crystalline lens were constant during accommodation.
Results: For the changes during accommodation, geometrical parameters were determined by different objective distances. Considering the constant volume of each part with the small decrement of the equator, we obtained the paraxial parameters, such as the anterior and posterior vertex radius of curvature and lens thickness. Compared with the experimental data published in the literature, calculated values using simple approximation showed similar change per accommodative stimulus.
Conclusions: These results showed that proposed simple approximation using assumption of constant volume and refractive index of the human crystalline lens made it possible to predict changes of geometrical parameters during accommodation.
|
|
|
KEYWORD
|
|
|
Schematic eye, Crystalline Lens, Accommodation, Accommodative stimuli, Accommodative response
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|