Eye layers
The external layer of the eye consist of: _____________ & _________________
Sclera & cornea
must be kept in the shape of a ball to maintain vision
vitreous body
Myopia is also called
nearsightedness
Fat deposits within the outer layer of the cornea is called_____________
arcus senilis
Young people with no vision problems need an eye exam every _______________ years
3-5
The colored part of the eye is called ___________ and contains the _______________ which is the opening that controls the amount of light that enters the eye.
Iris & pupil
Tear are produced through the_____________
lacrimal glands
farsightedness is also called
Myopia
The lower lid relaxes leading to dry eye manifestations
Ectropion
People over 40 should have an eye exam and glaucoma exam every _____________
year
The ______________ contains photoreceptors called rods & cones
Retina
increased IOP could cause __________________
hypoxia and blindness
unevenly curved surfaces of the cornea could cause________________
astigmatism
In an older adult the sclera may appear ______________
yellow or blue
Occupation & leisure activities that can affect vision are (name 4)
computer programming
machine operators
Exposure to UV light
Sports that may have blows to the head
Clear fluid that fills both ant. and post. areas of the eye
aqueous humor
The mucous membranes of the eye are called_______________
conjunctivae
Pupillary constriction is called _____________ and pupillary dialtion is called ______________
miosis & mydriasis
Color vision changes with aging leading to lack of discrimination of what colors
blue, greens, and violets
What drugs can affect vision and the eye: List 3 categories
antihistamines
decongestants
antibiotics
opioids
steroids
oral contraceptives
The __________ is convex and lies behind the iris
lens
Perfect refraction of the eye is called ____________
Emmetropia
the ability to maintain a clear image when gaze is shifted from far to near objects Is called _____________________
accommodation
Decreased tear production could lead to
dry eyes, increased risk for corneal damage and infections
Nutrition can affect vision. List some food choices that would positively affect vision.
red, orange, and dark green vegetables, a diet rich in fruit, Vitamin A, Beta carotene