Functions of the Eye: External
Prevent large particles from entering the eye.
What are eyelashes?
Lens of eyes gradually becomes cloudy.
What is Cataracts?
Circular opening in the choroid coat that allows light to enter the eye.
What is Pupil?
Sensitive to dim light.
What is rods?
What is the most common eye color?
What is brown.
Produce tears which cleanse and lubricate the eye.
What are Lacrimal gland?
Usually have difficulty distinguishing between reds, greens and occasionally blues. (common in guys)
What is Color Blindness?
Colored, muscular layer that surrounds the pupil.
What is Iris?
Sensitive to bright light and color.
What is cones?
The first step in the pathway of vision.
What is Cornea?
Cone-shaped cavity formed by the skull that houses and protects the eyeball.
What are Orbital Cavity?
Commonly known as pink eye. Inflammation of conjunctiva.
What is Conjunctivitis?
The optic nerve carries the impulses formed by the retina to the brain for interpretation.
What is Optic Nerve?
Innermost layer of the eye; Light rays reflect here to form an image; contains rods and cones.
What is Retina?
Where image is interpreted.
What is occipital lobe?
Protective membrane that lines the inside of the eyelids and covers the sclera (the white of the eye).
What is Conjunctiva?
Excessive intraocular pressure causing destruction of the retina and atrophy of the optic nerve.
What is Glaucoma?
Carries the impulses formed by the retina to the brain for interpretation.
What is Optic Nerve?
On retina, known as blind spot, nerve fibers form optic nerve here.
What is Optic Disc?
Lens loses elasticity, cannot focus on close or distant objects. (Goes with old age)
What is Presbyopia:“Old-sightedness”?
All five parts that make up the Functions of the external eye.
(Hint: We said all but one in the questions above)
What is Lacrimal gland, Conjunctiva, Eyelashes, Eyelids, and Orbital Cavity.?
An emergency situation where the ---- pulls away from the layer of blood vessels that provides it with oxygen and nutrients.
What is Detached Retina?
The clear outer layer at the front of the eye. Helps your eye to focus light so you can see clearly.
What is Cornea?
3 layers of the eye.
What is sclera, choroid, and retina?
Filled with vitreous humor, a jelly-like fluid that maintains eye shape and refracts light rays.
What is Posterior Chamber?