NDLI: Characteristic Parameters of MTF of the Retina-Brain System

Content Provider	IEEE Xplore Digital Library
Author	Zeng Bixin Chen Shisu
Copyright Year	2005
Description	Author affiliation: Dept. of Phys., Wenzhou Med. Coll. (Zeng Bixin; Chen Shisu)
Abstract	This paper aims to search parameters characterizing the MTF curve of retina-brain system of the human eye for distinguishing eye disease use. Suppose the MTF can be expressed by (for symmetric MTF) or (for asymmetric MTF). Let y = ln(MTF), x = lnf, the above formula can be transformed into y = $k_{1}x+...$ (for symmetric MTF) or y = $k_{1}'x+...(for$ asymmetric MTF ). Parameters $k_{i}s($ or $k_{i}'s)$ are determined by curve fitting from experimental data and used as discriminating indices to indicate various eye diseases. The effectivity of the curve fitting is evaluated by F test. The fitting parameters and the peak frequencies, fc, of MTF for normal eyes and eyes with diseases are shown in table 1 with corresponding F value and F value under 0.01 confidence level. The experimental data are taken from Wang's paper for normal eyes, and Fang's paper for eyes with diseases. It seems that the parameters $k_{i}s$ (or $k_{i}'s)$ can be used as the indices to distinguish eye diseases because they are remarkably different for normal and various eye diseases. In curve fitting, there are reasons to use cubic equations for symmetric MTF (as in the case of cataracts) and quadratic equation for asymmetric MTF (as in the case of amblyopia)
Starting Page	1224
Ending Page	1227
File Size	236184
Page Count	4
File Format	PDF
ISBN	0780387414
DOI	10.1109/IEMBS.2005.1616645
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-01-17
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Diseases Curve fitting Frequency Eyes Humans Testing Equations Vision defects Optical imaging Physics
Content Type	Text
Resource Type	Article

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