| For young peoThe term low vision can refer to | | | | Low vision has many potential causes. Some children |
| various vision conditions, such as partial sight, | | | | may acquire low vision from heredity or birth defect, |
| uncorrectable sight, tunnel vision, blind spots, legal | | | | while other children develop low vision from various |
| blindness and almost total blindness. | | | | eye injuries. In most cases, low vision occurs in |
| Consequences of low vision include blur or lack of | | | | seniors. In old people, eye disease is the major |
| acuity, decreased ability to distinguish colors, low | | | | contributor to low vision problems. Eye diseases that |
| contrast sensitivity and abnormal spatial relationship | | | | may cause low vision include cataracts, macular |
| perception. People with low vision may have vision | | | | degeneration, diabetic retinopathy, glaucoma and |
| problems in central vision zone or/and peripheral vision | | | | retinitis pigmentosa. Some of them affect central |
| zone. Some of them also suffer low night vision. | | | | vision and others impact peripheral vision. |