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Vocabulary
Vocabulary 2
Questions 1
Questions 2
Questions 3
100
A transparent, thick liquid. Fills up the hollow inside of the eye. Helps the eyeball keep its shape.
Vitreous Humor
100
A part of the eye where we cannot see any light that falls on it.
Blind spot.
100
When light is dark, the pupil is _______ and when light is bright the pupil is _______.
Dark = LARGER. Light = SMALLER
100
Why do some people have red eyes in photographs?
Light is reflecting off of the retina.
100
Describe what a lens is and what it is used for.
It is a curved piece of transparent material (usually glass). Used to refract, or bend, a light ray.
200
A thick transparent layer of the cells through which light enters the eye. Beginning to focus...
Cornea
200
Carries electrical messages from the retina directly to the brain.
Optic Nerve
200
Where are most of the rods and cones located in the eye?
In the fovea.
200
What are the four eye colors human beings can have?
Brown, Blue, Green and Hazel
200
Where does light bend toward in a lens?
The thickest part.
300
A clear watery fluid behind the cornea. Maintains constant pressure.
Aqueous Humor
300
Transparent, fat disk filled with clear jelly. Focuses the light on the back of the eye.
Lens
300
When are rods working the most? When are cones working the most and what do they help us to see?
Rods = dark room. Cones = bright light and color!
300
What are the ciliary muscles?
Muscles that change the lens shape to adjust focus to see near or distant objects.
300
What type of lens was found in most optical instruments?
Convex
400
A tiny muscle that controls the size of the pupil.
Iris
400
White part of the eye. Tough, opaque tissue that protects the eye.
Sclera
400
What part of the camera does the retina act like?
Film
400
This lines the inside of your eyelid and outside of the front of your eye.
Conjunctiva.
400
What optical instrument is used to see distant objects? How about small objects light a drop of water?
Refracting telescope. Microscope.
500
An opening in the iris. A black circular hole that light travels through.
Pupil
500
Moves your eye in all directions. 6 in total.
Optic Muscles
500
How do images appear on the retina?
Upside down!
500
Draw and label the two types of lenses. Draw how light passes through each lens.
500
What is the path light takes as it travels through your eye? (List the parts of the eye in order!)
CAPLVROB!