vision is a topic covered in the Taber's Medical Dictionary.

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(vizh′ŏn )

[L. visio, a seeing]

1. The act of seeing external objects.
SYN: SEE: sight; SEE: visual function
SEE: reading machine for the blind
2. The sense by which light, color, form, and contrast are apprehended.
3. An imaginary sight.

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