label: Macular cotton wool spot
label_lc: macular cotton wool spot
description: "Fluffy white patch on the macula, representing localized areas of dense white swelling of the retinal nerve fiber layer. They often have a zigzag internal structure, a feathered edge but an otherwise well-delineated form and an approximately 1 mm dimension; they project slightly into the vitreous and sometimes deflect retinal vessels."