Spherical and irregular aberrations are important for the optimal performance of the human eye
- 6 March 2002
- journal article
- research article
- Published by Wiley in Ophthalmic and Physiological Optics
- Vol. 22 (2), 103-112
- https://doi.org/10.1046/j.1475-1313.2002.00019.x
Abstract
Contrast sensitivity measured psychophysically at different levels of defocus can be used to evaluate the eye optics. Possible parameters of spherical and irregular aberrations, e.g. relative modulation transfer (RMT), myopic shift, and depth of focus, can be determined from these measurements. The present paper compares measured results of RMT, myopic shift, and depth of focus with the theoretical results found in the two eye models described by Jansonius and Kooijman (1998). The RMT data in the present study agree with those found in other studies, e.g. Campbell and Green (1965) and Jansonius and Kooijman (1997). A new theoretical eye model using a spherical aberration intermediate between those of the eye models described by Jansonius and Kooijman (1998) and an irregular aberration with a typical S.D. of 0.3–0.5 D could adequately explain the measured RMT, myopic shift, and depth of focus data. Both spherical and irregular aberrations increased the depth of focus, but decreased the modulation transfer (MT) at high spatial frequencies at optimum focus. These aberrations, therefore, play an important role in the balance between acuity and depth of focus.Keywords
This publication has 33 references indexed in Scilit:
- Optimal corneal ablation for eyes with arbitrary Hartmann–Shack aberrationsJournal of the Optical Society of America A, 1998
- The effect of defocus on edge contrast sensitivityOphthalmic and Physiological Optics, 1997
- Segregation of Form, Color, Movement, and Depth: Anatomy, Physiology, and PerceptionScience, 1988
- A QUANTITATIVE INVESTIGATION INTO THE EFFECTS OF PUPIL DIAMETER AND DEFOCUS ON CONTRAST SENSITIVITY FOR AN EXTENDED RANGE OF SPATIAL FREQUENCIES IN NATURAL AND HOMATROPINIZED EYESOphthalmic and Physiological Optics, 1987
- Optical Image Quality and the Cone MosaicScience, 1986
- Spatial summation and contrast sensitivity of X and Y cells in the lateral geniculate nucleus of the macaqueNature, 1981
- Subjective Measurement of High-Order Aberrations of the EyeScience, 1976
- The Spherical Aberration of the EyeJournal of the Optical Society of America, 1949
- INVESTIGATIONS INTO THE SPHERICAL AND CHROMATIC ABERRATIONS OF THE EYE, AND THEIR INFLUENCE ON ITS REFRACTIONActa Ophthalmologica, 1945