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Friday, August 10, 2007
about:
Similarities of the eyes to a camera
author:CaMaE518
What are their Difference?
I have read in a book that there is a big similarities between the eye and the camera, specially in the functions.
Both the camera and the human eye has the same kind of lens. It is both Converging. They both magnify the things that we see. Both of the lenses can focus to thing same distance with it but can only focus one at a time.
In focusing objects the human eye and camera differs because when and objects move closer to the lens, the lens move and adjusts keep the object in focus. but the human eye cannot move and do just like that of the camera, instead the ciliary muscles change the shape of the lens by making the lens bulge in the middle if the image comes closer to you and stretch if the object is further away. This is done so that the eyeball isn't stretched. The process of changing the shape of the lens is called ACCOMODATION. This is why most old people use glasses or reading glasses because the muscles gets stiffer and losses it ability to change shape when focusing in an object.
REMEMBER:
The shortest distance at which an object is in focus is called the near point of the eye, which is for a normal adult is about 25 cm. And the longest distance is called the far point of the eye
If the camera have its film that traps the light to form a permanent image, the human eye on the other hand has it retina. The retina has this CONES and RODS that send the information that was sensed by the eye and transmits it to the brain.The rods tell your brain if there’s light in a certain spot or not and the cones tell your brain what color the light is. However, there is some spot in the retina that is called the blind spot this was the reason why humans have two eyes or lenses. Since the camera doesn't have a blind spot, it only requires one lens.
Both the human eye and the camera can control the amount of light that passes through.
The human eye has its Iris and the pupil the changes in size depending on the amount of light. while in the camera the diaphragm controls the aperture (opening) of the lens and the shutter limits the passage of light.
===>>> Amazing! ang galing!!! ^_^ Hindi ko alam na parang Camera din pala 'tong mata natin. Yung sa Camera permanent image nga lang. Nakakatuwang malaman yung mga information na ito... kasi parang dati hindi ko lang pinapansin... pero nung nagkapagbasa-basa na ako about sa assignment amaze na amaze talaga ako. Kahit may konting pagkakaiba... mapapahanga ka talaga sa mga taong nagimbento nitong camera parang "artificial eye". ^_^
