Answer:
The correct answer is a. retinal disparity
Explanation:
Humans have two eyes that see the image at slightly different angles and for perception depth it is important to see the object from both the eyes. Retinal disparity is the way which helps in depth perception.
In this situation, the image seen by both the eyes at different angles is processed by the brain and after processing it is seen as a single image with the correct depth of the image. In many situations retinal disparity comes into play like diving.
Therefore if a person lacks an eye then retinal disparity is the visual cue that would be lacked by him.
A person with sight in only one eye lacks retinal disparity for seeing in depth.
Depth perception is first produced by retinal disparity, that is, the difference between the images of the two eyes, from which this difference is transformed into depth perception or stereopsis.
That is, retinal disparity is the difference in monocular images produced by the projection of points of the visual field provided by both eyes.
Therefore, we can conclude that a person with sight in only one eye lacks retinal disparity.
Learn more here: https://brainly.com/question/5854936
