Bv Lec 1

Question 1

4 conditions of normal binocular vision

Answer 1

Equal ocular images
Bifoveal fixation at all distance and gaze
Motor fusion at all distance and gaze
Sensory fusion at all distance and gaze

Question 2

3 levels of sensory fusion

Answer 2

1 Retinal rivalry or bifoveal perception
2 physiological diplopia
3 stereopsis

Question 3

How to get equal ocular images

Answer 3

Same size, shape, contrast, colour, clarity

Question 4

Conditions for bifoveal fixation at all distances and gazes

Answer 4

Accuracy within panning fusional area

AC/A must be similar for equality in distances

Comitancy for equality in gazes

Question 5

The condition for motor fusion is

Answer 5

Acquiring and maintaining single clear comfortable BV over varying distances and gazes

So means getting bifoveal fixation without stressing accommodation and or vergence