tunnel vision

a visual field defect producing the effect of perceiving the world through a long tunnel or tube. Peripheral vision may be entirely lost. Tunnel vision can occur in one or both eyes in uncontrolled glaucoma and retinitis pigmentosa and in both eyes after bilateral injury to visual processing areas beyond the optic chiasm. It may also be a conversion symptom. Also called tubular vision.

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Psychology term of the day

November 18th 2024

influencing machine

the subject of a delusion of persecution in which the individual feels controlled by a machine that serves as the instrument of persecution.