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Título

Monochromatic modulation transfer function of the human eye for different pupil diameters: an analytical expression

AutorArtal, Pablo; Navarro, Rafael CSIC ORCID
Palabras claveModulation transfer function (MTF)
MTF
Pupil sizes
Vision tests
Fecha de publicaciónene-1994
EditorOptical Society of America
CitaciónJournal of the Optical Society of America A 11(1): 246-9 (1994)
ResumenThe modulation transfer function (MTF) of human eyes for different pupil sizes was measured in a group of normal young subjects by use of a double-pass method. Measurements were carried out in the fovea, with monochromatic red light, paralyzed accommodation, artificial pupils, and optimum spherical refraction in each subject. For each pupil size both the averaged MTF and the intersubject variability were calculated. MTF's were approximated by the sum of two exponential functions. This three-parameter function provides a better approximation to our ocular MTF's than do most of the previous parametric models (usually one exponential), especially at intermediate and high spatial frequencies. Further curve fitting of the parameters allowed us to obtain a general expression for the mean MTF as a function of both pupil diameter and normalized spatial frequency. This equation summarizes our estimates of the average monochromatic retinal image quality of the human eye for any pupil diameter with good accuracy and in a compact way, which allows one to incorporate the eye's image quality easily in any particular study.
DescripciónContiene: 2 tablas, 5 ilustraciones y fórmulas.
Versión del editorhttp://www.opticsinfobase.org/abstract.cfm?URI=josaa-11-1-246
URIhttp://hdl.handle.net/10261/29950
DOI10.1364/JOSAA.11.000246
ISSN1084-7529
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