5 – Unusual visual phenomena and colour blindness

  • Choudhury A
  • 2


    Mendeley users who have this article in their library.
  • N/A


    Citations of this article.


Human visual perception is very complex. Under various circumstances we come across a number of unusual visual phenomena. Some of these are utilised by magicians to mesmerise audiences. Several scientists, such as Purkinje, Bezold–Brücke, Helmholtz–Kohlrausch, Hunt, Stevens, Helson–Judd, Bartleson–Breneman and Stiles–Crawford, have explained a few such unusual phenomena, which are discussed in this chapter. Types, causes and tests of colour blindness are explained.

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document


  • Asim Kumar Roy Choudhury

  • Asim Kumar Roy Choudhury

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free