An area of depressed vision located at the point of fixation and that interferes with central vision.

Difficulty with discriminating red and green hues.

Diminished clarity of vision.

A severe form of myopia with greater than -6.00 diopters.

A pale yellow discoloration of the optic disc (the area of the optic nerve head in the retina). The optic disc normally has a pinkish hue with a central yellowish depression.

Macular dystrophy is a nonspecific term for premature retinal cell aging and cell death, generally confied to the macula in which no clear extrinsic cause is evident.

Progressive maculopathy characterized by concentric regions of hyper- and hypo-pigmentation.

Visual impairment (or vision impairment) is vision loss (of a person) to such a degree as to qualify as an additional support need through a significant limitation of visual capability resulting from either disease, trauma, or congenital or degenerative conditions that cannot be corrected by conventional means, such as refractive correction, medication, or surgery.