Visual Defect Definitions

Question 1

Visual defects restricted to either the right or the left VISUAL FIELD.

Answer 1

Homonymous defects. (post-chiasmatic)

Question 2

Visual defects involving parts of both the left and the right VISUAL FIELDS so that visual field defects are non-overlapping. Almost always occur at the chiasm.

Answer 2

Heteronymous defects

Question 3

Defect vision or blindness in approximately one-half of the VISUAL FIELD.

Answer 3

Hemianopsia

Question 4

Defective vision or blindness in approximately one-fourth of the visual field.

Answer 4

Quadrantanopsia or quadrantanopia.