title: A low-power, LED-based, high-brightness anomaloscope.
abstract: Color matches made with a Nagel anomaloscope are used in the differentiation of color vision deficiencies. When these color matches are made over a wide range of retinal illuminances, the changes in the color match provide information about the regeneration kinetics and the absorption spectra of the middle- and long-wavelength cone photopigments. These steady-state color matches vary with a variety of conditions, and may have value in screening for eye disease. Recently, high-brightness LEDs have become available that allowed us to construct a LED-based, high-brightness anomaloscope. We used inexpensive, low-energy components to replicate an earlier instrument, getting a maximum retinal illuminance over 5.6 log Trolands.
authors.affiliation: The Schepens Eye Research Institute and Harvard Medical School, Boston, MA, USA. rwoods@vision.eri.harvard.edu
authors.forename: Russell L
authors.initials: RL
authors.lastname: Woods
authors.forename: Ahmed L
authors.initials: AL
authors.lastname: Rashed
authors.forename: Juan M
authors.initials: JM
authors.lastname: Benavides
authors.forename: Robert H
authors.initials: RH
authors.lastname: Webb
mesh_terms: D000221:Adaptation, Ocular / Q000502:physiology; D000328:Adult; D000368:Aged; D003118:Color Perception / Q000502:physiology; D003119:Color Perception Tests / Q000295:instrumentation*; D003117:Color Vision Defects / Q000175:diagnosis* / Q000503:physiopathology; D004581:Electronics; D004867:Equipment Design; D005260:Female; D006801:Humans; D008027:Light; D008297:Male; D008875:Middle Aged; D055095:Optics and Photonics; D010865:Pilot Projects; D011601:Psychophysics; D015203:Reproducibility of Results; D012160:Retina / Q000503:physiopathology; D017949:Retinal Cone Photoreceptor Cells / Q000502:physiology; D012168:Retinal Pigments / Q000502:physiology
chemical_list: D012168:Retinal Pigments