Question
Download Solution PDFThe eye-lens is a
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFCONCEPT:
THE HUMAN EYE:
- The human eye is one of the most valuable and sensitive sense organs.
- It uses light and enables us to see the colourful world around us.
- The human eye is more or less like a photographic camera.
- The lens system of the eye forms an image of an object on a light-sensitive screen.
- The eyeball is almost spherical in shape having a diameter of about 2.3 cm.
EXPLANATION:
- The eye lens is a transparent, biconvex structure in the eye that provides finer adjustment required to focus objects on the retina. Therefore option 3 is correct.
NOTE:
- The pupil is a hole through which light enters into our eye.
- Iris is a muscle in our eye that controls the size of the pupil. It dilates and contracts because of which size of the pupil varies.
- So we can say Iris controls the amount of light entering into our eye.
- Retina: An image is formed on the retina.
- Ciliary muscles are smooth muscle fibers. When the ciliary muscles relax the lens becomes flat and when they contract the lens becomes thicker. This change in curvature of the eye lens changes the focal length of the eyes.
Last updated on Jun 26, 2025
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