draw lebel diagram of human eyes and state function of 2 part.
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1-) In humans and most mammals and birds, the iris (plural: irides or irises) is a thin, annular structure in the eye, responsible for controlling the diameter and size of the pupil and thus the amount of light reaching the retina. Eye color is defined by that of the iris.
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2-) The lens is located in the eye. By changing its shape, the lens changes the focal distance of the eye. In other words, it focuses the light rays that pass through it (and onto the retina) in order to create clear images of objects that are positioned at various distances.
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The eye has many parts that must work together to produce clear vision:
- The eye has many parts that must work together to produce clear vision:The sclera, or white part of the eye, protects the eyeball.
- The eye has many parts that must work together to produce clear vision:The sclera, or white part of the eye, protects the eyeball.The pupil, or black dot at the centre of the eye, is an opening through which light can enter the eye.
- The eye has many parts that must work together to produce clear vision:The sclera, or white part of the eye, protects the eyeball.The pupil, or black dot at the centre of the eye, is an opening through which light can enter the eye.The iris, or coloured part of the eye, surrounds the pupil. It controls how much light enters the eye by changing the size of the pupil.
- The eye has many parts that must work together to produce clear vision:The sclera, or white part of the eye, protects the eyeball.The pupil, or black dot at the centre of the eye, is an opening through which light can enter the eye.The iris, or coloured part of the eye, surrounds the pupil. It controls how much light enters the eye by changing the size of the pupil.The cornea, a clear window at the front of the eye, covers the iris and the pupil.
- The eye has many parts that must work together to produce clear vision:The sclera, or white part of the eye, protects the eyeball.The pupil, or black dot at the centre of the eye, is an opening through which light can enter the eye.The iris, or coloured part of the eye, surrounds the pupil. It controls how much light enters the eye by changing the size of the pupil.The cornea, a clear window at the front of the eye, covers the iris and the pupil.A clear lens, located behind the pupil, acts like a camera lens by focusing light onto the retina at the back of the eye.
- The retina is a light-sensitive inner lining at the back of the eye. Ten different layers of cells work together in the retina to detect light and turn it into electrical impulses.
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