Vision & Light Path

Question 1

Conjunctiva

Answer 1

Thin clear layer that covers the eye

Question 2

Conjunctiva conditions

Answer 2

Conjunctivitis - inflammation (pink eye)

-causes: bacterial/viral, particle in eye

Question 3

Cornea/sclera

Answer 3

(Same layer) outer covering of the eye

• cornea: transparent (no blood vessels)
• sclera: white w/ blood vessels

Question 4

Cornea/ sclera: astigmatism

Answer 4

Imperfection in cornea or lens

Question 5

Cornea gets nutrients from…

Answer 5

Aqueous Humor

Question 6

Aqueous Humor jobs

Answer 6

• provides oxygen and nutrients to cornea

- maintains pressure in eye

Question 7

To much aqueous humor causes

Answer 7

To much pressure. This is called glaucoma.

Question 8

Aqueous humor drains from…

Answer 8

The canal of schlemiel

Question 9

Pupil/ iris

Answer 9

Pupil- opening

Iris- colored and controls pupil size with muscles

Question 10

Lens

Answer 10

Focuses the image, bends light to focus

Question 11

Lens is similar to a tree ring because

Answer 11

Adds new layers all the time, the older you get the less movement your lens has

Question 12

Lens: Cataracts

Answer 12

Layers on lens are no longer transparent and it blocks light

Question 13

Vitreous Humor

Answer 13

Jelly-like substance to support the eye (you don’t produce more)

Question 14

Retina

Answer 14

Light doesn’t actually pass through

Question 15

Retina is only attached to…

Answer 15

The vitreous humor

Question 16

Retina

Answer 16

Detects the light with light receptors

Question 17

Light receptors

Answer 17

• rods (b and w)

- cones (color)

Question 18

No light receptors in…

Answer 18

The blind spot

Question 19

Color vision- color blinding

Answer 19

Focuses on the X chromosome (effects cones)

• red-green (most typical)
• blue-yellow

Question 20

Optical nerve

Answer 20

Electrical impulse

Question 21

Brain

Answer 21

Last part of the light travel path

Question 22

20/20 vision

Answer 22

The bottom 20 represents where/how far someone would be for the chart

Question 23

Binocular Vision

Answer 23

Provides depth perception

Question 24

Protective structures

Answer 24

Cheek bones, eyebrows, eyelid, lashes, tears

Question 25

Path of light through eye

Answer 25

1. Conjunctiva
2. Cornea/sclera
3. Aqueous Humor
4. Pupil/iris
5. Lens
6. Vitreous Humor
7. Retina
8. Optic Nerve
9. Brains