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the iris
A camera's diaphragm and your eye's iris perform the same function in the same way. They both control how much light is allowed through the lens by expanding and contracting.
It is identical in action to the iris in your eye, it widens and narrows to allow only the required amount of light through the aperture hole/pupil
The iris is like the aperture part of a camera, which used to also be called the iris.
The emulsion on the film of a camera is where the image is focused and captured. In the eye that function is performed by the retina.
Light source and diaphragm. The diaphragm is the opening like and iris in the stage. It can be made large and small like the pupils of the eye.
Film or Paper
In a camera the following parts could be considered equivalent to the parts of a human eye:Optical diaphragm = IrisAperture in optical diaphragm = PupilOuter lens element / lens glass = CorneaInner lens element = Eye lensCCD Sensor (in a digital camera) = RetinaThis is a huge simplification of a very complex topic. Please see the related links for more information.
If you have photographic memory then your eye functions like a camera in a way
These are some of the differences between the camera and the human eye.the human eyes uses living cells while the camera is artificial,the eye focus the image using the retina while the camera changes the position of the lenses,the amount of light enters the eye is control by the iris while in camera it is by the diaphragm,
These are some of the differences between the camera and the human eye.the human eyes uses living cells while the camera is artificial,the eye focus the image using the retina while the camera changes the position of the lenses,the amount of light enters the eye is control by the iris while in camera it is by the diaphragm,
Eye can capture an image for 1/20th of a second.And, this is how the eye works like a camera.