A custodian with low vision in a public school setting was having difficulty viewing the carpeted area he was vacuuming.A lighting system was mounted on the custodian's industrial vacuum cleaner and the custodian was provided a headlamp.For more information about how to determine whether a person has a disability under the ADA, see How to Determine Whether a Person Has a Disability under the Americans with Disabilities Act Amendments Act (ADAAA).People with low vision may develop some of the limitations discussed below, but seldom develop all of them.Also, the degree of limitation will vary among individuals.Be aware that not all people will need accommodations to perform their jobs and many others may only need a few accommodations. A buyer for a department store has low vision and was accommodated with a CCTV magnification device for reading paper documents and screen magnification software for her computer.• Other Vision Related Conditions o Night Blindness: Night blindness results from pigmentary degeneration of the retina, which leads to difficulty seeing in low light.
She was provided with a glare guard for the computer monitor and large print keyboard labels, which significantly enhanced accuracy.
o Glaucoma: Pressure inside the eye is elevated and can cause damage to the optic nerve, which results in damage to peripheral vision.
o Macular Degeneration: There is a disturbance of blood vessels in the eye resulting in progressive loss of central vision.
Vision impairments result from conditions that range from the presence of some usable vision, low vision, to the absence of any vision, total blindness.
Low vision is a term that describes a person with a vision impairment that cannot be improved by correction but has some usable vision remaining.