Originally prepared by
Steve Seow for
PY
1 Elementary Psychology:
An
Introduction to Mind and Behavior
Professor Billy Wooten
Spring 2004
Brown University
Last revised on March 2,
2004
In the blind spot lab, we obtained the following information:
+ = fixation point
x = demarcation of blind spot
a = distance from fixation point to farthest point of blind spot
b = distance from fixation point to nearest point of blind spot
c = distance from observer to fixation point (6 or 12 feet)
Using the above measurements, we calculated:
d = angle from fovea to furthest point of blind spot
e = angle from fovea to nearest closest point of blind spot
f = viewing angle “blinded” by the blind spot
In addition to describing the blind spot in degrees, it is also useful to describe its location relative to the fovea:
We can calculate this by
