Causes and typical patterns of low vision which cannot be corrected include:

• Blurred or partially obscured central vision: Macular degeneration (both, age-related, and hereditary)
• Blind spots, blurriness, and visual distortions: Diabetic retinopathy
• Poor peripheral vision, or tunnel vision: Glaucoma
• Poor peripheral vision, and inability to see in the dark: Retinitis pigmentosa
• Eye injuries
• The poor central vision which may progress to no light perception: Optic neuropathies which may be inherited or acquired (toxic)