Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
66 Cards in this Set
- Front
- Back
|
what is the approx diameter of the eye
|
25 mm
|
|
|
Where does light enter the eye
|
The Cornea
|
|
|
What is the Cornea?
|
Where the light enters the eye
|
|
|
what does the Cornea cover?
|
The aqueous humor
|
|
|
what is the clear liquid region behind the cornea?
|
The aqueous humor
|
|
|
What is behind the lens?
|
The vitreous humor
|
|
|
What is the retina?
|
light sensitive part of the eye
|
|
|
what is the retina made up of?
|
Rods and Cones
|
|
|
What is the purpose of the optic nerve?
|
Sends electial impulses to the brain
|
|
|
What is the importance of the brain?
|
interprets the image on the retina
|
|
|
What is the colored Portion of the eye?
|
the Iris
|
|
|
What is the purpose of the iris?
|
acts as a controller because it has a variable opening through which light passes
|
|
|
What is the opening through which light passes called?
|
the pupil
|
|
|
The diamter of the pupil ____in bright light
|
decreases
|
|
|
the diameter of the pupil ____in low light
|
increases
|
|
|
what is the shape of the lens altered by?
|
The cillary muscle
|
|
|
how is the lens connected to the cillary muscle?
|
suspensory ligaments
|
|
|
1
|
Cornea
|
|
|
2
|
Aqueous humor
|
|
|
2
|
Aqueous humor
|
|
|
3
|
Lens
|
|
|
4
|
Iris
|
|
|
5
|
Cillary Muscle
|
|
|
6
|
suspensory ligament
|
|
|
7
|
Vitreous Humor
|
|
|
8
|
Retina
|
|
|
9
|
optic nerve
|
|
|
What is the image formed on the retina
|
real, inverted, and smaller
|
|
|
What is fixed, Do, Di, or f?
|
Di
|
|
|
what adjusts the focal length of the lens in the eye?
|
the ciliary muscles
|
|
|
when an eye looks at a distant object, the ciliary muscle is..
|
relaxed
|
|
|
when the eye looks at a near object the ciliary muscle is
|
tense
|
|
|
when the eye is relaxed, is it at its most or least curvature?
|
least
|
|
|
when the eye is relaxed it the focal length longer or shorter?
|
longer
|
|
|
what makes it possible for the eye to focus on different distances?
|
accomodation
|
|
|
what is the closest point at which your eye can see clear objects
|
the near point
|
|
|
at what point is the eye fully relaxed
|
the far point
|
|
|
what is the approx far point
|
infinity
|
|
|
what is the approximate near point
|
25 cm
|
|
|
What does nearsighted mean?
|
People can only focus on near things and far things are blurry
|
|
|
For nearsighted people, f is....
|
too short
|
|
|
where does the image of a nearsighted person appear?
|
infront of the retina
|
|
|
nearsightedness can be corrected using....
|
diverging lenses
|
|
|
What can a farsighted person see
|
things that are faraway, but can't focus on things that are close
|
|
|
what kind of lens is used to correct farsightedness
|
converging
|
|
|
for a converging lense f is...
|
+
|
|
|
what color of light bends the most?
|
violet
|
|
|
What color of light bends the least?
|
red
|
|
|
what is the middle callled on fiberoptic cables?
|
core
|
|
|
what is the outside called in fiberoptic cables?
|
cladding
|
|
|
total internal reflection occurs only.....
|
when going from a higher n to a lower n
|
|
|
what is the formula for n?
|
speed of light in a vacuum (c)/ speed of light in material (v)
|
|
|
what is snell's law?
|
n1Sin1=n2Sin2
|
|
|
What are the tpes of converging lenses
|
Double convex, convex meniscus, plano-convex
|
|
|
what are the three types of diverging lenses?
|
Double concave, Plano-concave, concave meniscus
|
|
|
what sign is f for a converging lens?
|
+
|
|
|
what sign is f for a diverging lens?
|
-
|
|
|
when drawing ray diagrams, the objct is always on the ______of the lens?
|
left
|
|
|
when is Do +
|
when the object is on the left of the lens
|
|
|
when is Do -
|
if the object is on the right of the lens
|
|
|
what does it mean when Di is +
|
real image
|
|
|
what does it mean when Di is -
|
Virtual image
|
|
|
what side of the lens is Di +
|
left
|
|
|
what side of the lens is Di -
|
left
|
|
|
For a farsighted person, glasses bend light
|
away from the principal axis
|
|
|
For a nearsighted person, glasses bend light
|
toward the principle axis
|
