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Chapter 12
| Question | Answer |
|---|---|
| Legally blind | has a visual of 20/200 or less in the meter eye even with correction or has a field of vision so narrow that its widest diameter subtends and angular distance no greater than 20 degrees |
| low vision | visual acuity falling between 20/70 and 20/200 in the better eye with correction |
| braille | a system of dots by which people who are blind read with their fingertips |
| cornea | a transparent cover in front of the iris and pupil |
| aqueous humor | a water substance between the cornea and the lens of the eye |
| pupil | the contractile opening the the middle of the iris |
| Iris | the colored portion of the eye |
| lens | refines and changes the focus of the light rays before they pass through the vitreous humor |
| vitreous humor | a transplant gelatinous substance that fills the eyeballs between the retina and lens |
| retina | the back portion of the eye, containing nerve fibers connected to the optic nerve |
| optic nerve | carries info to the back of the brain |