1. Discuss why binocular vision is superior to monocular vision for perceiving d
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Question
1. Discuss why binocular vision is superior to monocular vision for perceiving distance to objects and the size and shapes of objects. 2. (a) Discuss the different roles of central and peripheral vision in the control of movement, and explain how these roles indicate that there are two anatomical visual systems. (b) If you wanted to reach for a cup of water to take a drink from it, describe how the two visual systems would operate to allow you to do this task. 3. Describe the spatial and temporal relationships between your eyes and hand when you move the computer mouse so that the cursor points to arn icon on the monitor.Explanation / Answer
Ans 1...In monocular vision only one eye can take up the visual field presented.but with binocular vision their is overlap of visual field bacuse eyes are close together.bimocular vision has greater perception of depth and this vision can better distinguish the distance of an object.binocular vision allow us to view the world in three dimension
Ans 2...Central vision is when your eyes look straight ahead covering three degrees of our visual field.it allows us to drive ,read and see details sharply and it also helps us to estimate distance in the path ahead.
Prephral vision is also know as the side vision .It allows us to see objects which are outside the direct line of vision
Role of vision in movement is very crucial.the movement performed must concide with the result of what is being seen.for example in catching a ball one must perform movement by estimating the distance speed ,the approach of ball etc and that can be only done if the approaching ball is being seen.The optic nerve send signal to brain for what the eyes sees.then the CNS process this information and send signal to the motor system of the action required in response to the stimulus.
Ans 2..b..To approach a cup first both central and peripheral vision will be used to localise the cup that whether it lies in the direct path or not .After seeing the cup,the distance between you and the cup is estimated by the central vision now this information is sent to brain which process and send further signal to motor system that is our hand to approach and pic that cup.
Ans 3..The spatial and temporal eye hand coupling suggest commonly shared information between the neural pathway underlying the control of eyes and hand movement .The common information could form if the two pathways exchange and match the spatial and temporal information.
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