Exam Bank for Low Vision Rehabilitation- Questions with Verified Solutions Latest Version (Already Passed)

Exam Bank for Low Vision Rehabilitation- Questions with Verified Solutions Latest Version (Already Passed) Low vision - Answers a condition that can't be corrected by medical/surgical intervention or by eyeglasses allows some usable vision but is severe enough to interfere in completing daily activities Blindness - Answers inability to see light or form or to use vision in any functional way Legal Blindness - Answers used by the government in order to determine eligibility for benefits person must have 20/200 vision (or worse) in the better eye OR have 20 degrees of visual field (or less) in the better eye NOT A TRUE DIAGNOSIS OT Role's in low Vision Rehab w/ Adults - Answers maximize a client's ability to participate in chosen & necessary occupations Normal Changes in the Aging Eye - Answers presbyopia (refractive error that makes it hard for middle-aged and older adults to see things up close) need for increased light Dry eyes age-related cataracts Floates Decreased fat around eye, leading to eyelid droop Age-Related Macular Degeneration (AMD) (Dry or Wet) - Answers causes progressive destruction of the cells of the macula (mostly cones), including in the fovea doesn't progress beyond central visual field, therefore doesn't cause total blindness, as peripheral vision is preserved Dry AMD - Answers deposits (drusen) form on the retina, froming scotomas (blind spots) happens gradually Wet AMD - Answers approx 10% of those with AMD will develop wet AMD clusters of blood vessels form on the retina - then break...bleeding into the retina Vision loss is rapid Functional Impairments Related to AMD - Answers decreased visual acuity decrease ability to read decreased ability to see faces (may reduce social participation due to inability to see facial expressions) decreased color discrimination decreased night vision increased glare sensitivity decreased contrast sensitivity decreased participation/abilities in ADLs & IADLs Diabetic Retinopathy - Answers abnormalities develop in the vasculature supplying the retina - impairing oxygen supply Early Stage Diabetic Retinopathy (Non-proliferative) - Answers the small vessels weaken and develop small bleeds into the retina, damaging that part of the retina scotomas can be anywhere on the retina Later Stage Diabetic Retinopathy (Proliferative) - Answers retina attempts to re-vascularize by growing new vessels new vessels are small & weak - and also break & bleed into the retina - & even into vitreous humor Functional Impairments Related to Diabetic Retinopathy - Answers fluctuating visual manifestations blurred vision patchy visual field loss decreased visual acuity decreased ability to read decreased color discrimination decreased night vision increased glare sensitivity decreased contrast sensitivity decreased participation/abilities in ADLs & IADLs Glaucoma - Answers group of diseases causing increased intraocular pressure - causing damage to the optic nerve, resulting in "tunnel vision" permanent damage occurs Open Angle Glaucoma (most common) - Answers fluid flows through the eyeball through channels called the trabecular meshwork fluid doesn't drain efficiently - causing increased pressure treated w/ eye drops Closed Angle Glaucoma - Answers occurs when the trabecular meshwork is blocked corrected by surgery Functional Impairments Related to Glaucoma - Answers decreased peripheral vision - impairs safety during driving and mobility decreased participation/abilities in ADLs & IADLs Cataracts - Answers clouding of the lens - common w advancing age (can occur in children) most common cause of blindness develop slowly not usually surgically corrected until "ripe" - when they significantly impair function surgery removes the natural lens, replacing with an intraocular lens implant that can correct acuity Functional Impairments Related to Cataracts - Answers blurred vision decreased visual acuity decreased ability to read decreased ability to see faces decreased color discrimination decreased night vision increased glare sensitivity decreased contrast sensitivity decreased participation/abilities in ADLs & IADLs Visual Processing - Answers 1/3 to 1/2 of the brain is devoted in one way or anothe