2. What is blindness?
• Blindness is commonly used as visual impairment, with
residual vision.
• No sight than the ability to tell light from dark and the general
direction of a light source.
• Legal blindness is defined as visual acuity 20/200.
• That means a person has to stand 20 feet from an object to
see it.
3. What disease causes
blindness?
• Cataracts is the leading cause of blindness. 47.9% of the blind
have cataracts.
• Glaucoma is the second leading cause. 12.3% people have this
disease.
• The third leading cause is age related. 8.7% are diagnose with
this.
