A Simplifed Model Eye for Testing Fundus Imaging Device.
10.3969/j.issn.1671-7104.2019.01.006
- Author:
Jianhua PENG
1
;
Xiaohang JIA
1
;
Jingtao WANG
1
;
Yiping HU
1
Author Information
1. Zhejiang Institute of Medical Device Testing, Hangzhou, 310018.
- Publication Type:Journal Article
- Keywords:
Gullstrand I model eye;
fundus imaging device;
human eye refractive tissue;
model eye
- MeSH:
Cornea;
Fundus Oculi;
Lens, Crystalline;
diagnostic imaging;
Refraction, Ocular
- From:
Chinese Journal of Medical Instrumentation
2019;43(1):21-24
- CountryChina
- Language:Chinese
-
Abstract:
Based on the Gullstrand I model eye, a simplified model eye for testing fundus imaging device is designed. The model eye can reach the following requirements:(1) The refractive characteristics of the ocular refractive tissue are simulated, and the equivalent focal length in air is 17 mm; (2) The differences between relative refractive index differences of the adjacent materials of the simplified model eye and relative refractive index differences of any adjacent two layers (cornea and aqueous humor, aqueous humor and lens, lens and vitreous body) of the Gullstrand I model eye are not more than 1%; (3) In the case of the incident aperture diameter of 3 mm, the differences of radii of the diffuse spots formed by the paraxial light and the axial light are not more than 15%; (4) The differences of angles of chief ray and tangent line of the fundus are not more than 1°; (5) In the case of the incident aperture diameter of 3 mm, the differences of MTF values of the near axis light are not more than 0.1. The simplified model eye can be expected to be used for testing fundus imaging device instead of the test method in ISO 10940:2009 Ophthalmic instruments-Fundus cameras.
