PHYSICS AND THE VISUAL ARTS
Notes on LAB 5
OPTICS OF THE EYE AND STEREOSCOPY
Activity 2.
Measuring your field of view this way is not easy. Hold the edge of the protractor close to (but not touching)your
cornea. Arrange the protractor so that when you look straight ahead, you look past the center to the 90° mark. With
the protractor horizontal move a finger along the scale until you can no longer see it. You should be able to see
about 90° away from straight ahead on the temporal side, but noticeably less on the nasal side of your eye because
your nose blocks part of the view. Similarly, with the scale held vertically, find the limits of your vision
vertically. You will probably find that your brow blocks off more than your cheek. You can interpolate the vision at
other angles by drawing a smooth curve joining the four extreme points just measured. If you draw the graph called
for properly, you will see that the vision of the two eyes has considerable overlap - the region from which you
derive your stereo vision. But you will also notice that a considerable part of your visual field is separately
accessible to only one eye at a time.
Activity 3. Part 4.
The stereoscopic viewing glasses are the clear plastic lenses.
Activity 3. Part 5.
The red/cyan viewing glasses are the ones with the colored plastic filters that are used to view the anaglyphs.
Note that I called them filters and not lenses. They are simply thin sheets of color filter material and do not
refract (image) the light, they only block particular colors from reaching your eyes.
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Last Modified: 07/14/11
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