Unit 5: Visual Fields Flashcards
Scotoma
Area where vision is partially or fully reduced
Ipsilateral
Visual field defect on the same side as lesion
Contralateral
Visual field defect on opposite side of lesion
Homonymous
Affecting the same part of the visual field of each eye
Hemianopia
Half of visual field has defect
Injury on the right side of the brain would affect this visual field
Left visual field of each eye
Homonymous hemianopia
the same half of both eyes is affected
Quadrantanopia
Quarter of the visual field scotoma
Central defect
Scotoma in the centre of the visual field
Arcuate defect
Arc shaped defect extending towards the blind spot
Macular sparing may occur if lesion is here
-More anterior part of the brain
-More peripheral fibres(?)
Monocular horizontal field of view
150 Degrees
Monocular superior and inferior field of view
60 and 50 Degrees respectively
Binocular view covers how many degrees centrally
120
Reasons for visual field defects
-Trauma
-Systemic disease
-Eye diseases