File: RetinalMMToDegrees.m

package info (click to toggle)
psychtoolbox-3 3.0.9%2Bsvn2579.dfsg1-1
  • links: PTS, VCS
  • area: main
  • in suites: wheezy
  • size: 63,408 kB
  • sloc: ansic: 73,310; cpp: 11,139; objc: 3,129; sh: 1,669; python: 382; php: 272; makefile: 172; java: 113
file content (12 lines) | stat: -rw-r--r-- 308 bytes parent folder | download 
1
2
3
4
5
6
7
8
9
10
11
12
 
function degs = RetinalMMToDegrees(mm,eyeLengthMM)
% degs = RetinalMMToDegrees(mm,eyeLengthMM)
%
% Convert extent in mm of retina in the fovea to degrees
% of visual angle.
%
% See also: DegreesToRetinalMM, EyeLength.
%
% 7/15/03  dhb  Wrote it.

tanarg = (mm/2)/eyeLengthMM;
degs = 2*(180/pi)*atan(tanarg);