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chapter 12
| Term | Definition |
|---|---|
| leagally blind | visual activity 20/200 or less in the etter eye even with correction or has a feild of vision so narrow that its widest diameter subtends as angular distance no greater than 20 degrees |
| low vision | partially sighted |
| braille | system of raised dots by which people who are vlind read with their fingertips |
| cornea | transparent cover in front of the the iris and pupil |
| aqueous humor | water substance between the cornea and lens of the eye |
| iris | colored part of the eye |
| pupil | contractile opening in the middle of the iris |
| lens | refine and focus of the light rays |
| vitreous humor | geletain substance that fills the eye betwen the retina and lens |
| retina | back part of the eye, containing nerve fibers |
| optic nerve | carries information to the brain |
| visual acuity | ability to see fine details |
| snellen chart | consists of rows of letters (alphabet) |
| functional vision assessment | observing stuent interaction in doffrent enviroments |
| refraction | bending light rays as they pass through the various structures of the eye |
| myopia | nearsightedness |
| hyperopia | farsighted |
| astigmatism | blured vision |
| optic nerve | nerve at the back of the eye sends visual info to the brain |
| glucoma | group of eye disease, like excessive fluid in the eye |
| cataracts | clouding of the lens of the eyes, resulting in blurred vision |
| diabetic retinopathy | interference with blood supply to the retina |
| cortical visual impairment (cvi) | cause of blindess in children - occurs in the brain |
| retinopathy of prematurity (rop) | cause of blindess in children - occurs in the eye |
| optic nerve hypoplasia (onh) | cause of blindess in children - occurs in the nerve cells |
| retintis pigments | hereditary condition resulting in degerneration of the retina |
| tunnel vision | narrow field of the vision |
| night blindness | ability to see in low light |
| starbismus | one or both eyes are directed inward (cross eyed) |
| nystagmus | rapid involuntary movements happen in the eye |
| orientation and mobility (o&m) | ability to hav ea senseof where one is in raltion to other people |
| cognitive mapping | help navigate through enviroment |
| echologcation | ability to detect where sounds are coming from |
| obstacle sense | theory formed that blind people develop an extra sense |
| phonological awerness | important component to read braille and print |
| sterotypic behavior | repetative, expected bahvaior |
| expanded core cirriculum (ecc) | students with blidness or low vision need more than usual core academics support |
| unified english braille (ueb) | combining codes to read with fingers |
| large print books | support students with larger text and magnifiying devices |
| magnifying devices | support students with larger text and magnifiying devices |
| long cane | give people with blindness support when walking |
| tactile maps | embossed representations of the enviroment |
| braille notetakers | offer support to students |
| nfb-newsline | access to magazines and newspapers on a digital device |
| descriptive video service | narrarated desrpition of key visual of programs and tv |
| screen readers | magnify information on a screen |
| itinerant teacher service | vision teacher supporting genral education teacher |
| cirriculum-based measurment (cbm) | measuraing academic progress |
| accessible pedestrian signials (aps) | alert people who are blind to when it is safe to cross an intersection |
Created by:
nmyers05