Eye model for inspecting the image quality of IOLs
Zhenping Huang1, Renfeng Xu, Chunyan Xue
1Department of Ophthalmology, Nanjing General Hospital of Nanjing Military Command, PLA, Nanjing 210002, China. hzp19633@hotmail.com
Purpose:
To inspect and compare the image quality of an aspheric intraocular lens (IQ, Alcon) with those of conventional monofocal silicone and acrylic intraocular lens and multifocal intraocular lens (Array).
Methods:
The IOLs were tested in the eye model, which was designed to be optically equivalent to the theoretical eye model. The eye model is a combination of a spherical photographic lens with 35 mm focal length (IOL put in a water cell) and a charge coupled device (CCD) camera. The images constructed by the lenses are observed on a monitor of personal computer and the contrasts of the images are analyzed by using commercial image processing software. SHARP value is used to measure and estimate image definition.
Results:
The images constructed by changing the diameter of aperture stop and IOL. Observed by this eye model, the image definition of aspheric intraocular lens (IQ, Alcon) is better than others.
Discussion:
The proposed eye model is useful for testing functional vision and for inspecting the differences of intraocular lens.
