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The retina is behind the eye-lens and at the back part of the eye. In which part of the eye rods and cone cells are found and what is the function of these cells?
Source: www. The retina is a delicate membrane which consists these two cells namely rods and cone.
The retina of an eye is just like the film in a camera. Rods and cones are light sensitive cells which respond to the intensity of light and colour of objects respectively, by generating electrical signals.
What is blind spot? At the junction of optic nerve and retina in the eye, there are no light sensitive cells i. This is called blind spot.
So, we can say that blind spot is a small area of the retina insensitive to light where the optic nerve leaves the eye. What is the function of Iris and Pupil in the eye?
The iris controls the amount of light entering the eyes. The iris automatically adjusts the size of the pupil according to the intensity of light received by the eye. On the other hand, if the amount of light received by the eye is small as in a dark room or during night, the iris expands the pupil make it large, so that light may enter the eyes. List of Important Discoveries in Physics 6.
What do you understand by the term accommodation? The ability of an eye to focus the distant objects as well as the nearby objects on the retina by changing the focal length or converging power of its lens is called accommodation. A normal eye has a power of accommodation which enables objects as far as infinity and as close as 25 cm to be focused on the retina.
The power of accommodation of the eye for a person having normal vision is about 4 dioptres.
When we increase the distance of an object from the eye, what happens to the image distance in the eye? Therefore, after increasing the distance of an object from an eye, there will be no change in the image distance inside the eye.
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