Eye and Vision Quiz

Question 1

What is the function of the Eye?

Answer 1

The Eye works in light refraction in order to capture light, bounce it around through its various layers, eventually hitting the retina to display vision to the brain

Question 2

What are the overall Steps of Vision? (5 steps)

Answer 2

1. Light is captured/bent by Cornea
2. Passed through Aqueous Humor
3. Enters through the Pupil, controlled by the Iris
4. Lens directs light to Retina, and it passes through Vitreous Humor
5. Finishes with hitting the Retina

Question 3

What is the overall structure/composition of the Eye?

Answer 3

The Eye is primarily composed of many Rods and Cones, Rods picking up low energy/gray light and Cones pick up high energy/color light

Question 4

What are Rods?

Answer 4

Parts of the eye that are found around the edges of the Retina. It picks up low energy light, only gray/black and white, and allows peripheral vision

Question 5

What are Cones?

Answer 5

Parts of the eye that are found densest in the Retina’s center. They allow detailed sight and color vision. “C for Color”

Question 6

What is “20/20 Vision?”

Answer 6

The idea of the Eye being set for distant vision, or 20< feet away

Question 7

What is Accommodation?

Answer 7

The Eye lens closing to focus on closer objects 20> feet away, or opening to focus on objects 20< feet away

Question 8

What MUST benders of light be?

Answer 8

‘Lightbenders’ MUST be solid structures!

Question 9

How many parts of the Eye refract light? What are they?

Answer 9

The Eye has 4 light refactors. They are:

• The Cornea
• Aqueous Humor
• Lens
• Vitreous Humor

Question 10

What are the names for the two most common Eye problems? (Nearsightedness and Farsightedness)

Answer 10

• Myopia (Nearsightedness)
  
  • Distant objects are blurry and
    near ones are clear
  • Light from objects are brought
    to point before they hit The
    Retina
  • CAUSED BY AN ELONGATED
    EYE
• Hyperopia (Farsightedness)
  
  • Closer objects are blurry and
    far ones are clear
  • Near objects do not spread
    light in time to hit the Retina
  • CAUSED BY A SHORT EYE

Question 11

What is Emmetropia?

Answer 11

The term for when Eyes are structured and function normally/as intended

Question 12

What is the Sclera? What is its function?

Answer 12

Outermost tunic of the eye. It protects the Eye

Question 13

What is the Cornea? What is its function?

Answer 13

The most outer part of the front of the eye, it is transparent and covers the Iris and Pupil. It captures and allows light to enter the Eye

Question 14

What is Vascular Tunic or Choroid layer? What is its function?

Answer 14

The middle layer of tissue surrounding the Eye, it is nutritive tunic. It captures light with its dark pigment, preventing it from scattering. It is red and muscly

Question 15

What is Sensory Tunic or Retina? What is its function?

Answer 15

The most superficial layer of tissue surrounding the Eye. It is a tunic that contains millions of receptor cells (Rods & Cones) to receive outside light. It is yellow and veiny

Question 16

What is the Lens? What is its function?

Answer 16

The clear, elliptical structure that sits behind the Iris. It transmits light and focuses it on the Retina. It looks like an oval with a jawbreaker-like design

Question 17

What is the Iris? What is its function?

Answer 17

The colored tissue at the front of the eye which holds the pupil between it. It controls the Pupil’s opening and closing, regulating the amount of light which enters the Eye

Question 18

What is the Optic Disk? What is its function?

Answer 18

Also known as the blind spot, the Optic Disk is located at the posterior back of the eye, within the Vitreous Humor. It is the part that transmits visuals to the brain, allowing vision. It is the opening to the stem behind the eye

Question 19

What is the Fovea Centralis? What is its function?

Answer 19

A small, dark depression near the anterior back of the Eye, it is round. It plays a giant role in allowing/controlling central vision

Question 20

What is Aqueous Humor? What is its function?

Answer 20

The clear fluid which fills the space between the Cornea and Lens/Iris/Pupil. It nourishes the Eye and helps refract light

Question 21

What is Vitreous Humor? What is its function?

Answer 21

The transparent fluid which makes up the interior of the eyeball, behind the Lens. It nourishes the Eye and helps it keep its shape. It also aids in light refraction from the Lens to the Retina

Question 22

Which part of the Eye focuses light on the Retina?

Answer 22

The Lens

Question 23

Which part of the Eye transmits visual impulses towards the Brain?

Answer 23

The Optic Disc (blind spot), this small hole allows optic nerves to fire towards the brain, which is why we cannot see light that hits that part