1.  Home
  2. Whitepapers
  3. Two-Dimensional (X-Y) Stiles-Crawford Effect

Two-Dimensional (X-Y) Stiles-Crawford Effect

Download Whitepaper

Two-Dimensional (X-Y) Stiles-Crawford Effect

Download Whitepaper
Dr. Philip Kruger at the State University of New York, College of Optometry, used 100 W Quartz Tungsten Halogen Oriel® Light Sources and Optical Accessories to build a system to measure the two-dimensional (X-Y) Stiles-Crawford Effect. The Stiles-Crawford Effect results from the fiber-optic nature of retinal cones. Cones have very small acceptance angles, and as a result, they only capture light from a relatively small area near the center of the pupil. Thus, light entering near the center of the pupil appears brighter than light entering near the edges of the pupil. As a result, the pupil is effectively smaller than the real pupil.

Download Whitepaper Now