| Quadrantanopia | |
|---|---|
| Classification and external resources | |
Right superior quadrantanopia. The areas of the visual field lost in each eye are shown as black areas. This visual field defect is characteristic of damage to Meyer's loop on the left side of the brain. |
|
| ICD-10 | H53.4 |
| ICD-9 | 368.46 |
Quadrantanopia, quadrantanopsia, or quadrant anopia refers to an anopia affecting a quarter of the field of vision.
It can be associated with a lesion of an optic radiation.[1] If Meyer's loop (temporal pathway) is lesioned, the vision loss is superior (colloquially referred to as "pie in the sky"); if Baum's loop (parietal pathway) is lesioned, the vision loss is inferior.[2]