The Eye Flashcards
List the 5 protective structures of the eye.
(1) eye orbit, (2) eye lids, (3) eye lashes & brows, (4) conjunctiva, and (5) tears from lacrimal glands.
________ of tears cause a runny nose.
Excess
The outer layer of the eyeball is formed from ______.
sclera
The middle layer of the eyeball is called:
choroid
The choroid is made of _______ tissue and prevents _____.
vascular tissue, reflection
The ______ muscle gives the eye the ability to chage shape for focus.
Ciliary
The ______ is in the inner part of the eye and is where impulses attach to optic nerve to occipital lobe.
retina
What part of the eye contains visual receptors?
Inner
There are more rods than cones (T/F)
True
The ____ is the colored part of the eye.
Iris
_______ detects light and helps with night vision.
Rods
________ detect color and are at the center of the retina.
Cones.
The ________ ______ is the blind spot.
optic disk
The _______ _______ is a watery type substance in the anterior chamber of the eye.
aqueous humor
The aqueous humor is located ____ to the lens.
anterior
If the aqueous humor is not draining or is producing too much, the condition called _______ occurs.
glaucoma
The ______ ______ is located posterior to the lens and is a jelly-like substance that gives the eyeball its shape and keeps the retinal lining in place.
Vitreous body
What nerves supply the eye (3)?
optical, cranial, trigenimal
The _______ _______ is near the optic nerve.
fovea centralis
When the eye does not have enough cones, a person will be ______ _____.
color blind
________ is the light sensitive pigment contained in the ______.
Rhodopsin; rods
List the 3 types of muscles of the eye.
(1) extrinsic, (2) intrinsic, (3) ciliary
The _______ muscles are voluntary and give the eye the ability to move the eye.
extrinsic
The ______ muscles are involuntary, located in the eye structure, and form the iris.
Intrinsic
The iris causes the pupils to ________ or _______ to regulate the amount of light into the eye.
constrict, dilate
The ________ muscle holds the lense in place and controls its shape.
Ciliary
