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A surgical procedure to remove vitreous from the eye.

A visual field test is an examination that may be performed to analyze a patient’s visual field. The test may be performed by a technician directly, with the assistance of a machine, or completely by an automated machine. Machine based tests aid diagnostics by allowing a detailed printout of the patient’s visual field. See Perimetry

Field of vision: The entire area that can be seen when the eye is directed forward, including that which is seen with peripheral vision. The area visible to an eye that is fixating straight ahead.