peripheral Vision Snack (fwd)

From: Nina Thayer (nthayer@exploratorium.edu)
Date: Wed Sep 05 2001 - 20:23:44 PDT

From: Paul Doherty <pauld@exploratorium.edu>
To: Michael.Kennedy@Benning.Army.Mil
Subject: peripheral Vision Snack

Hi Michael

I am a physicist at the Exploratorium.

The peripheral vision snack cannot be used to measure a person peripheral
vision because it is too easy to cheat.

Opthalmologists use a device which features a red blinking light in the
center and randomly flashes a tiny point of light around a uniform ggray
field.
When the viewer sees the flash he/she presses a button. This maps the field
of view and also traces the ouitline of the blind spot.

Here is a write-up on optical perimetry exams.
http://www.geocities.com/ocular_times/vf.html

Here is an on-line version of this experiment.
http://www.psych.purdue.edu/~coglab/VisLab/BlindSpot/blindspot.html

Here's another program
http://www.lasiksafety.com/VPC/vpc.htm

I hope this helps

Paul Doherty

Paul "But it is more complicated than that!" Doherty,
Senior Staff Scientist, The Exploratorium.
pauld@exploratorium.edu, www.exo.net/~pauld

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