Gist of Lesson for Quick Revision (By JSUNIL)
1. An eye is the most important organ of the human body. It is associated with vision and acts as a vital optical instrument.
2. An eye is spherical in shape of about 2.3 cm diameter and is covered externally by a hard thick and opaque layer called Sclerotica. The outermost layer of the eye is sclerotic that prtects and holds the eye.
3. Cornea is transparent partbulging out of eye and allows the light to enter in the eye. Cornea is also known as the window or aperture of the eye.
4. Iris is a circular diaphragm having a hole in its centre .this hole is called pupil
5. Iris has muscles and coloured pigments that provide different colour y eyes
6. Iris controls the amount of light entering the eye through the pupil.
7. The pupil becomes small when bright light falls on the eye. However, it becomes wide when there is dim light.
7. The pupil becomes small when bright light falls on the eye. However, it becomes wide when there is dim light.
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