Quiz 4 Flashcards
What makes up the outer fibrous layer?
Sclera posteriorly and cornea anteriorly
What makes up the middle layer of the internal eye?
Choroid posteriorly, and ciliary body/iris anteriorly
Inner layer of the internal eye?
Retina
Is the sclera vascular or avascular ?
Avascular
What in continuous with the sclera anteriorly ?
Cornea
What is a major part of the refractive power of the eye?
Cornea
What makes up the uvea ?
Iris, ciliary body, choroids
What produces aqueous humor and contains the muscles controlling accommodation ?
Ciliary body
Is the choroid vascular or avascular ?
Richly vascular
Contraction or relaxation of the ciliary body changes the thickness of what?
The lens
What is the sensory network of the eye ?
Retina
Where does the optic nerve originate?
The optic disc
When does the eye form during gestation??
8 weeks
What interprets impulses as visual objects ?
Retina
Term infants vision is?
Hyperopic 20/400
When Can a infant differentiate colors?
6 months
When is adult visual acuity achieved?
4 years old
When is lacrimal drainage complete?
At birth q
What is the major physiological eye change that occurs with aging>?
Presbyopia
What is the order for visual examinations ?
External eye inspection, visual acuity, visual fields, pupillary exam, opthalmascopy
What should purples be/do?
Pupils are Equal, Round, Reactive, to Light, and Accommodation. (PERRLA)
How far away is the patient away on the snellen chart?
20 feet
What is the name for the right eye?
Oculus dextra
What is the name of the left eye?
Oculus sinistra
What is the name given to both eyes?
Oculus uterque
If a patients vision gets better by reading through a hole in a 3x5 card what is this called?
Pinhole occluder
What is the name of the card for a close vision test?
Rosenbaum near vision card
The superior oblique is innervated by what nerve?
Trochlear nerve
Lateral rectus is innervated by?
Abducens
For color vision testing what is the name of this test?
Ishihara color vision test
What could one find by testing peripheral vision ?
Occipital strokes, optic chiasm tumors
What degrees do you test peripheral field with?
60 nasal, 90 temporally, 50 superiorly, 70 inferiorly
What are you looking for in accommodation? (Near point reflex)
Convergence causes constriction