Abstract
THE lack of correlation between the absolute light threshold of the dark-adapted eye and the 'ability to see in the dark' has been currently attributed to psychological factors; but little attention has been given to the behaviour of contrast sensitivity, despite the fact that vision at low illumination depends largely on the perception of differences in brightness. In particular, the possibility of variations in contrast sensitivity independent of variations in the absolute threshold does not seem to have been investigated, although the occurrence of such variations seems likely from the observations of Edmund and others1,2.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: 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.
