There are six levels of visual function

1. Normal vision
2. Moderate vision impairment
3. Severe vision impairment
4. Profound vision impairment
5. Near-total vision impairment
6. Blindness

What is low vision

Loss of eyesight caused by disease or injury to the eye or brain that cannot be corrected with glasses, contact lenses, surgery, or medical treatment

Most common patterns of vision loss

• Loss of central vision (AMD, diabetic retinopathy)
• Loss of peripheral vision (glaucoma, stroke, retinitis pigmentosa)
• Blindness (various acquired and hereditary eye conditions)
• Blurred or hazy vision (e.g., corneal disorders)

Vision rehabilitation

The process of assessing patients with vision impairment and helping them to make the best use of their remaining vision to regain or retain their independence and quality of lives.