CBSE BoardEnglish MediumSTD 11 HumanitiesPsychologySensory, Attentional And Perceptual Processes3 Marks
Question
Explain the working of the eye.
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Answer
Passing through conjunctiva, cornea and pupil, the light enters the lens, which focuses it on the retina.
Retina is divided into two parts: the nasal half and the temporal half.
The inner half portion of the eye(towards the nose) taking the center of fovea as midpoints, is called the nasal half.
The outer half portion of the eye (towards the temple) form the center of fovea.
Light from right visual field stimulates the left half of each eye (i.e. the nasal half of the right eye and the temporal half of the left eye), light from the left right half of each eye (i.e. the nasal half of the left eye and the temporal half of the right eye).
An inverted image of the object is formed on the retina.
The neural impulse go to cortex through the optic nerve where the image is re inverted and processed.
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