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35 Cards in this Set
- Front
- Back
the perfect refraction of the eye.
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Emmetropia
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the eye does not refract light enough (farsightedness).
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Hyperopia
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the eye overrefracts or overbends the light (nearsightedness).
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Myopia
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a refractive error caused by unevenly curved surfaces on or in the eye, especially of the cornea
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Astigmatism
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pupillary constriction
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Miosis
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pupillary dilation
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Mydriasis
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What is the process of maintaining a clear visual image when the gaze is shifted from a distant to a near object called?
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Accommodation
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What is the cause of miosis?
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Light and close reading.
( the pupil reacts to the light and becomes smaller.) |
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What is the cause of mydriasis?
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Low light (darkness) or looking at a distance.
( the pupil gets larger to allow for light in. ) |
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Pupil constriction and dilation control the amount of ___________ entering the eye.
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light
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the perfect refraction of the eye.
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Emmetropia
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the eye does not refract light enough (farsightedness).
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Hyperopia
|
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the eye overrefracts or overbends the light (nearsightedness).
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Myopia
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a refractive error caused by unevenly curved surfaces on or in the eye, especially of the cornea
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Astigmatism
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pupillary constriction
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Miosis
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the perfect refraction of the eye.
|
Emmetropia
|
|
the eye does not refract light enough (farsightedness).
|
Hyperopia
|
|
the eye overrefracts or overbends the light (nearsightedness).
|
Myopia
|
|
a refractive error caused by unevenly curved surfaces on or in the eye, especially of the cornea
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Astigmatism
|
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pupillary constriction
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Miosis
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What is it called when the lower eyelid is relaxed and falls away from the eye?
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Ectropion
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What can cause dry eye symptoms?
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Ectropion and some medications.
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What are the structural age-related changes of the eye?
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Decreased eye muscle tone
•Ectropion and dry eye •Arcus senilis •Corneal changes •Changes in color of sclera •Less ability to dilate pupil •More light needed for reading |
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Decreased eye muscle tone reduces the ability to____________________.
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to keep gaze focused on a single object.
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What is arcus senilis?
What is its cause? Does it affect vision? |
-Bluish white ring around the edge of the cornea.
-Caused by fatty deposits. -NO |
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After the age of 65 the cornea flattens in the eye? What does this cause?
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distorted or blurred vision.
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What color does the sclera change to with age?
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Yellow
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What is needed when the pupils ability to dilate decreases with age?
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More light to see. Teach pt. safety
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What are the age-related functional changes of eye?
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•Lens yellows.
•Accommodation is gradually lost. •Near point of vision increases (presbyopia). •Far point decreases. •Color perception decreases. •Intraocular pressure increases. |
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What colors are harder for the aging eye to see?
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Green
Blue Violet |
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What is the normal intraocular pressure (IOP)?
Does it increase or decrease with age? |
-10-21
- Decrease |
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Presbyopis commonly begins at what age?
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40
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What eye problem is more common in men?
What eye problem is more common in females? |
- retinal detachment
- dry eye syndrome |
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What is pruritus?
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itching
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What is photophobia?
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sensitivity to light
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