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a central computer system,such as a mainframe,that is used by
multiple users and applications simultaneously
Near Point
The closest distance at which an object can be seen clearly by the eye, a measure of the eye's accommodation ability.
Accommodation
The process by which the eye changes optical power to maintain a clear image or focus on an object as its distance varies.
Elastic
Capable of returning to its original shape after being stretched or compressed, a property of certain materials.
Sclera
The white, outer layer of the eyeball that provides protection and shape.
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