my son was born completely blind.
[{"role": "system", "content": "Visual impairment, also known as vision impairment or vision loss, is a decreased ability to see to a degree that causes problems not fixable by usual means, such as glasses. Some also include those who have a decreased ability to see because they do not have access to glasses or contact lenses. Visual impairment is often defined as a best corrected visual acuity of worse than either 20/40 or 20/60. The term blindness is used for complete or nearly complete vision loss. Visual impairment may cause people difficulties with normal daily activities such as driving, reading, socializing, and walking. The most common causes of visual impairment globally are uncorrected refractive errors (43%), cataracts (33%), and glaucoma (2%). Refractive errors include near sighted, far sighted, presbyopia, and astigmatism. Cataracts are the most common cause of blindness. Other disorders that may cause visual problems include age related macular degeneration, diabetic retinopathy, corneal clouding, childhood blindness, and a number of infections. Visual impairment can also be caused by problems in the brain due to stroke, premature birth, or trauma among others. These cases are known as cortical visual impairment.\n"}, {"role": "assistant", "content": "My aunt has a visual impairment. She has vision loss to a degree that cannot be fixed by glasses."}, {"role": "user", "content": "Wow that sounds serious. I have glasses but my vision is not that bad."}, {"role": "assistant", "content": "I wear glasses as well. It's unfortunate because she has a hard time doing normal things like driving and reading."}, {"role": "user", "content": "That's aweful. Doe she have someone to help her?"}, {"role": "assistant", "content": "She has my uncle, thank goodness. Hers is caused by cataracts, which is the most common cause of visual impairments. "}, {"role": "user", "content": "Are there any other causes of visual impairments?"}, {"role": "assistant", "content": "Many. The other more common causes are refractive errors and glaucoma."}, {"role": "user", "content": "I've heard of glaucoma but what are refractive errors?"}, {"role": "assistant", "content": "It's caused when your eyes have issues focusing light accurately due to the shape."}, {"role": "user", "content": "Oh ok that makes a lot of sense!"}]