<unk>  is visual field loss that preserves vision in the center of the visual field, otherwise known as the<unk>  It appears in people with damage to one hemisphere of their visual cortex, and occurs simultaneously with bilateral homonymous hemianopia or homonymous quadrantanopia. The exact mechanism behind this phenomenon is still uncertain. The opposing effect, where vision in half of the center of the visual field is lost, is known as<unk>  splitting.
Macular sparing
Macular scarring
Macular edema
Progressive retinal atrophy
Tunnel vision
Optic disc pallor
Optic disc drusen
Macular hypoplasia