Taking Pictures VS Saving Pictures

            

             Click…….. Click…….. Sound coming from the shutter of an analog camera while capturing images. A camera consists of several parts such as cover, shutter, aperture, iris diaphragm, convex lens and film which are essential and useful in performing its main task. But is there any biological features or parts which could be compared exactly as CAMERA?

             WELL the answer is HUMAN EYE!!!!!!!

             But How????

            Human Eye is one of the sense organs which is responsible for vision. It mainly consists of basic parts such as Eyelids, Cornea, Pupil, Iris, Lens and Retina. The Eyelids are made of muscles which opens and closes the eyeball. This can be compared to  the Shutter of a camera which opens and closes the aperture to control the passage of light while capturing the image. The Cornea serves as the “window of the eye” which is made of a layer that covers and protects the eyeball similar to the Casing of a camera. Next part of the eye is the Pupil which is a tiny opening that allows the light to enter. This is similar to the Aperture of the camera. The pupil is being controlled by a muscle called aqueous humor which make it contracted if the eye is exposed in an intense light and is enlarged in dim light. Next is the Iris which serves as the “color of the eye” and is responsible for the regulation or control of the passage of light similar to what the Iris Diaphragm of the camera is doing. The Lens of the eye is responsible for the refraction of light which is needed for its registration. Camera also uses convex lens to perform the same function but the only difference is that lens of the eye is made of very small tissues with a texture like a jelly and has a capability of self-focusing called accommodation while the lens of a camera is made of either glass or plastic with focusing capability through mechanical means. Last part for human eye is the Retina where the image is registered or formed. This can be compared to the Film of a camera. But their main difference is that the image formed at the film can be developed in a photo paper unlike the retina whose registered image is just converted into an electric impulse and is carried, interpreted and saved by our brain through the optic nerve.