i am 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": "Do you have visual impairment? It means that you have a reduced ability to see, that can't be fixed by normal means such as glasses"}, {"role": "user", "content": "I do indeed. I wear glasses and have astigmatism. You?"}, {"role": "assistant", "content": "I do not, visual impairment is defined as having worse than 20/40 or 20/60 vision"}, {"role": "user", "content": "Yes. Can you see the full spectrum of colors?"}, {"role": "assistant", "content": "I can, but visual impairment can cause difficulties in every day activities, such as driving and reading"}, {"role": "user", "content": "Yes, if I am pulled over while not wearing my glasses, I will receive a ticket."}, {"role": "assistant", "content": "Well, visual impairment can be caused by issues like stroke, or premature birth"}, {"role": "user", "content": "I had my daughter five days early and she sees perfectly well."}, {"role": "assistant", "content": "Well, if a person has impairment due to those causes, it is called cortical visual impairment"}, {"role": "user", "content": "That is very intersting. Are there other causes for visual impairment?"}]