Eye and Vision

Human eye is a wonderful organ and it helps us in seeing the world around us. Human eye is almost spherical in shape. The front white portion is called retina. Iris is present behind the retina and is followed by the lens. Iris regulates the amount of light entering the eye. Lens adjusts according to the distance of the object. Retina is the place where image is formed. In the eye, a real and inverted image is formed on the retina. Various photosensitive cells in the retina convert the image into nerve signals. These signals are picked by the optic nerve and sent to the brain. The brain interprets these signals and we are able to see an image.

Human Eye Quiz