Binocular Depth Perception

Question 1

What is depth perception?

Answer 1

The visual judgment, in the “Z” dimension of space, of the distance between objects or surfaces, expressed in “relative” terms of measurement.

Question 2

For SILO, adding BO makes the target appear _______.

Answer 2

smaller

Question 3

For SOLI, BO makes the target appear __________.

Answer 3

larger

Question 4

What determines binocular parallax?

Answer 4

Absolute depth

Question 5

What is the binocular parallax?

Answer 5

vergence angle of an object if looking directly at it

Question 6

What is absolute disparity?

Answer 6

The difference between the binocular parallax of an object and the convergence angle of the eyes.

Question 7

What gives the stimulus for fusional vergence?

Answer 7

absolute disparity

Question 8

What is the visual sensitivity to absolute disparity?

Answer 8

Not very good. 6 minutes of arc

Question 9

What happens if absolute disparity is less than 6 minutes of arc?

Answer 9

Will not stimulate vergence movement

Question 10

What is the stimulus for stereopsis?

Answer 10

The difference between the absolute horizontal disparities of two points.

Question 11

the relative disparity between two points in REAL space is ____________ proportional to the SQUARE of the distance from the observer.


Answer 11

inverseley

Question 12

Why dont small movements of the eyes result in depth changes?

Answer 12

They are applied to all objects in the visual field

Question 13

What is depth constancy?

Answer 13

perception that the depth within a familiar object (or the distance between two objects) is unchanged despite the change in binocular disparity that occurs when the viewing distance changes.

Question 14

When do absolute and relative vertical disparities exist?

Answer 14

1) When an object is nearer to one eye than to the other
2) When the observer is experiencing the induced effect of aniseikonia

Question 15

What are vertical disparities used for?

Answer 15

used to scale perceived depth and
size of stereoscopic surfaces

Question 16

Equation for disparity gradient

Answer 16

disparity / separation

Question 17

Horizontal disparity gradient for objects on the horopter

Answer 17

0 disparity gradient

Question 18

The horizontal disparity for objects inside the horopter

Answer 18

infinite

Question 19

the target is independently presented to one eye.

Answer 19

Stereoscopic half-view

Question 20

two stereoscopic half-views, one of which is
presented to the right eye and one to the left eye.

Answer 20

Stereo pair

Question 21

the complete figure formed by binocularly viewing a stereo pair.

Answer 21

Stereogram

Question 22

an instrument that alters the relationship between distance and disparity by means of lenses, mirrors, or prisms so that an 
 independent image can be presented to each eye.

Answer 22

stereoscope

Question 23

disparity in a stereogram is _______ proportional (linear) to the target distance

Answer 23

inversely

Question 24

What kind of glasses do vectograms (titmus test) use?

Answer 24

anaglyph glasses