Final 46 Flashcards
Rods
Low light
Peripheral vision
Cones
Bright light
Color
Central vision
Glaucoma
Increased pressure resulting in hypoxia of photoreceptors and nerve fibers
Movement of the eye
6 vouluntary muscles
Cranial nerves 3, 4, 6
Emmetropia
Perfect refraction of the eye
Hyperopia
Farsightedness
Eye does not refract enough light
Myopia
Nearsightedness
Overbends the light
Astigmatism
Refractive error caused by unevenly curved surfaces on or in the eye, especially the cornea
Miosis
Pupillary constriction
Mydriasis
Pupillary dilation
Accommodation
Haze is shifted from a distant to near object
Convergence
Ability to turn both eyes inward
Arcus senilis
Opaque, bluish white ring within out edge of cornea. Caused by fat deposits
Presbyopia
40 eyes
Ishihanra chart
Color vision
Snellen chart
Letter chart
Systemic conditions that effect the eye
Diabetes Hypertension AIDS Thyroid Lupus
Drugs that affect the eye
Antihistamines Decongestants Antibiotics Anticholenergic Opioids
Nutrition
Fruit
Red, orange and dark green vegetables
Lutein, beta carotene
Cataract
Decreased water
Increased density of lens
Painless
PERRLA
Pupils equal round reactive to light and accommodative
Near vision test
Rosenbaum pocket vision screener
Jaeger card
Hold 14 inches away
Normal pupil diameter
3-5 mm
Nystagmus normal
Normal finding for far lateral gaze
