The human eye suffers from significant amounts of ocular chromatic aberration (OCA) caused primarily by chromatic dispersion, which in turn is caused by the variation of refractive indices of the eye’s refractive media with wavelength. Chromatic dispersion causes the focus, size, and position of retinal images to vary with wavelength as illustrated schematically in Fig. 1. Variation in the focusing power of the eye with wavelength is called longitudinal (or axial) chromatic aberration (LCA), typically quantified in diopters. LCA causes the retinal conjugate in object space to vary with wavelength, which means that only one wavelength of light emitted by a broad-spectrum source can be well-focused on the entrance apertures of retinal photoreceptors at any moment in time. Retinal image size for extended objects also varies with wavelength, which is called chromatic difference of magnification (CDM). For any given point on an extended object, the position of the retinal image varies with wavelength. This phenomenon is called transverse (or lateral) chromatic aberration (TCA), usually specified as a visual angle subtended at the eye’s nodal point or pupil center.

© 2012 Optical Society of America

PDF Article
More Like This
Measurement and Correction of Transverse Chromatic Aberration with the Adaptive Optics Scanning Laser Ophthalmoscope

Wolf M. Harmening, William S. Tuten, Pavan Tiruveedhula, Lawrence C. Sincich, and Austin Roorda
FTu5G.3 Frontiers in Optics (FiO) 2012

Chromatic Aberration as a Possible Cue to Specify the Sign of Defocus in the Eye

Philip B. Kruger
FTu4G.2 Frontiers in Optics (FiO) 2012

Retinal image quality with the different types of intraocular lenses including new idea of the hybrid IOLs

D. Siedlecki, M. Zając, and J. Nowak
6633_81 European Conference on Biomedical Optics (ECBO) 2007


You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
Login to access Optica Member Subscription