Abstract
The authors first review some fundamental notions concerning the increment thresholds of an isochromatic or heterochromatic object of small angular extent projected on a large luminous background. The topography of such thresholds can be studied by means of Goldmann's static perimeter, of which the basic features and the spectrophotometric calibration are described. The examination of the relative achromatic sensitivities to white, blue, green and red objects along the horizontal meridian of 68 normal eyes, which were subdivided in three groups of different mean ages, allows us to recognise marked differences amongst these relative sensitivities according to eccentricity and to age; these variations are put into relationship with modifications of the spectral curve of relative luminous efficiency.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.