quadrantanopia

n. loss of vision in one fourth, or one quadrant, of the visual field. Homonymous quadranopia is the loss of vision in both (upper or lower) quadrants of the same half (right or left) of the visual field of each eye (e.g., left upper quadranopia); it is caused by postchiasmatic brain injury (see postchiasmatic visual deficit). Also called quadranopia; quadrantanopsia; quadrantic hemianopia.

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Psychology term of the day

September 1st 2024

economy

1. any system of rules and regulations by which something is managed; for example, a token economy is one in which a behavioral system is managed according to the disbursement of tokens as rewards.

2. management of resources in order to maximize efficiency or returns (material or psychological) and to avoid waste.