Mechanisms of Human Color Vision
{'Code': '08090200', 'Directorate': {'Abbreviation': 'BIO', 'LongName': 'Direct For Biological Sciences'}, 'Division': {'Abbreviation': 'IOS', 'LongName': 'Division Of Integrative Organismal Systems'}}
{'SignBlockName': 'Christopher Platt', 'PO_EMAI': None, 'PO_PHON': None}
Color vision depends on the activity of certain photoreceptors                  called cone cells in the retina of the eye.  Humans generally                   have three cone types, classified by the sensitivity of their                   absorbing pigment to short-, medium-, and long-wavelengths of                   light.  The relative numbers of different cone types in the                     retina has been difficult to determine by direct methods, but is                fundamental to our understanding of human visual sensitivity and                color vision.  This information is essential for any quantitative               model of human color vision.                                                                                                                                    In this project, Dr. Cicerone will continue her novel work                      using precise psychophysical techniques rather than anatomy to                  obtain numerical estimates of the relative and absolute numbers                 of different cone types.  Tests for discrimination of colored                   target signals allow calculation of thresholds for color                        perception, which may differ in different parts of the visual                   field if different parts of the retina contain different ratios                 of cone types.  Certain kinds of color blindness are found where                only two kinds of cones are present in the retina; people with                  this trait are called dichromats, in contrast to the normal                     retina of trichromats.  Colored stimuli can be used to test for                 the properties of mid- and long-wavelength sensitive cones in                   different parts of the human dichromatic and trichromatic                       retinas.  She will use this information to constrain and extend                 models of human color vision, and these models will be important                for both perceptual psychologists and neuroscientists.
{'FirstName': 'Carol', 'LastName': 'Cicerone', 'PI_MID_INIT': 'M', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Carol M Cicerone', 'EmailAddress': None, 'NSF_ID': '000473713', 'StartDate': '07/15/1989', 'EndDate': None, 'RoleCode': 'Principal Investigator'}
{'Name': 'University of Colorado at Boulder', 'CityName': 'Boulder', 'ZipCode': '803090001', 'PhoneNumber': '3034926221', 'StreetAddress': '3100 MARINE ST', 'StreetAddress2': 'STE 481 572 UCB', 'CountryName': 'United States', 'StateName': 'Colorado', 'StateCode': 'CO', 'CONGRESSDISTRICT': '02', 'CONGRESS_DISTRICT_ORG': 'CO02', 'ORG_UEI_NUM': 'SPVKK1RC2MZ3', 'ORG_LGL_BUS_NAME': 'THE REGENTS OF THE UNIVERSITY OF COLORADO', 'ORG_PRNT_UEI_NUM': None}
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{'Code': '1185', 'Text': 'SENSORY SYSTEMS'}
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