AMBV 1

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advantages of 2 eyes
spare eye, binocular summation, larger field of view, stereopsis
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what is stereopsis
ability to perceive depth using binocular vision
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what is binocular summation
increase in our visual ability when using two eyes as our brain receives more information when both eyes are working together
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what is fusion
ability to form one single image from two different retinal images (binocular single vision)
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what happens when object in fusion are differrent?
supression, confusion or rivalry
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what is supression in terms of fusion
this occurs to eliminate one image to prevent any confusionq
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what is confusion in terms of fusion
one image is presented on top of the other image (superimposed)
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what is binocular rivalry in terms of fusion
alternating supression of the two eyes so there is an alternating perception of the two images
(flick between seeing the two images, they compete)
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what is sensory fusion
ability to appreciate two images as one. they must be similar in size, brightness and sharpness
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what is motor fusion
the ability to align the eyes so that sensory fusion can take place. extra ocular muscles need to be functioning well
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what are the corresponding retinal points
the points that receive light rays from objects points stimulated on the retina that give rise to the same visual direction.
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diplopia
two non corresponding points can result in double vision. the foveas are looking at two different objects
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what is disparity
difference in image location seen by the left and right eyes. used to extract information about depth.
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what is important for stereopsis?
overlap of visual fields, disparity detection, coordinated and conjugate(married) eye movements
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what is a manifest deviation?
misalignment of visual axis leading to strabismus, squints and tropias
no occlusion deviation is present
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what is a latent deviation?
a phoria only exposed by breaking binocular vision
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what does concomitant mean?
a tropia/ phoria that is constant regardless of gaze or whichever eye is fixating
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what does incomitant mean?
a tropia/phoria that changes in size depending on direction of gaze and which eye is fixating
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Other cards in this set

Card 2

Front

what is stereopsis

Back

ability to perceive depth using binocular vision

Card 3

Front

what is binocular summation

Back

Preview of the front of card 3

Card 4

Front

what is fusion

Back

Preview of the front of card 4

Card 5

Front

what happens when object in fusion are differrent?

Back

Preview of the front of card 5
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