Accommodation in human eye models: a comparison between the optical designs of Navarro, Arizona and Liou-Brennan
Journal Title: International Journal of Ophthalmology - Year 2017, Vol 10, Issue 1
Abstract
"AIM: To simulate and compare accommodation in accommodative and non-accommodative human eye models. METHODS: Ray tracing and optical design program was used. Three eye models were designed and studied: the Navarro, the Arizona and the Liou-Brennan. In order to make the Navarro and Liou-Brennan models to accommodate, specific geometric parameters of the models were altered with values that were chosen from the literature. For the Arizona model, its’ mathematical functions for accommodation were used for the same accommodative demands. The simulation included four distances of accommodation for each model: at infinity, 3, 1 and 0.5 m.The results were diffraction images of a “letter F” for graphical comparison, spot diagrams on the retinal field and Modulation Transfer Function (MTF) graphs. RESULTS:Zernike coefficients for the aberrations, Airy disk diameter, root mean square (RMS) error diameter and total axial length of the model were provided from the program. These were compared between them in all distances. The Navarro model had the smallest axial length change as a simple model. The Arizona did not change its axial length because it is designed to be accommodative. The Liou-Brennan model had different results concerning the aberrations because of the decentration of the pupil. The MTF graphs showed small differences between the models because of the differences in their designs. CONCLUSION: All the three models are able to simulate accommodation with the expected results. There is no model that can be assumed as the best choice. Accommodation can be simulated in non-accommodativemodels and in customized ones."
Authors and Affiliations
Georgios Zoulinakis
Keywords
Related Articles
- EP ID EP613103
- DOI 10.18240/ijo.2017.01.07
- Views 58
- Downloads 0
Disparate expression of autophagy in corneas of C57BL/6 mice and BALB/c mice after Aspergillus fumigatus infection
"AIM: To determine the disparate expression of autophagy in the Aspergillus fumigatus (A. fumigatus) keratitis between susceptible C57BL/6 mice and resistant BALB/c mice. METHODS: C57BL/6 and BALB/c mice were used to est...
Retinal ganglion cell complex changes using spectral domain optical coherence tomography in diabetic patients without retinopathy
"AIM: To assess the ganglion cell complex (GCC) thickness in diabetic eyes without retinopathy. METHODS: Two groups included 45 diabetic eyes without retinopathy and 21 non diabetic eyes. All subjects underwent full medi...
A cross-sectional study on compliance with topical glaucoma medication and its associated socioeconomic burden for a Chinese population
"AIM: To estimate the overall drug compliance for local Chinese glaucoma patients on long-term topical treatment. METHODS: This was a retrospective cross-sectional study. Fifty-seven primary glaucoma patients from the su...
The 100 most influential papers about cataract surgery: a bibliometric analysis
"AIM: To identify the 100 most cited papers in cataract surgery, we performed a comprehensive bibliometric analysis basing on the literature search on the Thomson Reuters Web of Knowledge. METHODS: The number of citation...
Axial length/corneal radius of curvature ratio and refractive development evaluation in 3- to 4-year-old children: the Shanghai Pudong Eye Study
"AIM: To measure and analysis axial length (AL)/corneal radius of curvature (CRC) ratio and other refractive parameters, provide a medical reference range for refractive development evaluation and earlier visual impairme...