Light and Optics Flashcards
If you are nearsighted, your eyes are long or short?
Long
What is the part of the eye that connects to our brain?
Optic nerve
What is the part of the eye that shows us the colour of the eye and helps control the amount of light going into the eye?
The Iris
If you are farsighted, your eyes are long or short?
Short
What is the part of the eye that allows us to zoom in and out on objects?
The lens
What is the part of the eye that allows us to see colour?
The Retina
What is the part of the eye that allows animals to see in the dark?
The tapetum lucidum/reflective layer
What part of the eye helps protect the eye from infections and dirt?
The Cornea
What is the part of the eye that helps maintain the eye’s shape?
Vitreous humour
What part of the eye helps nourish the lens?
Aqueous humour
What is the part of the eye that helps provide structural strength and protection from the rupture of the eye?
The Sclera
What part of the eye helps focus light into the eye?
The Lens
How do we correct farsightedness?
We use Convex
What does it mean to be farsighted?
It means that you can only see things that are far away. Things nearby will be blurry.
What does it mean to be nearsighted?
It means that you can only see things that are nearby. Things far away will be blurry.
How do we correct nearsightedness
We use concave.
Why is the blind spot in our eyes?
Because that is where the optic nerve is and that part of the eye has no light-sensitive cells.
When nearsighted, the focal point goes behind or ahead of the retina?
Ahead
Is the aqueous humour at the front or back at the eye?
The front, right ahead of the lens
Is the vitreous humour at the front or back at the eye?
It takes up the back, behind the lens
What is the focal point?
It is the point where the light rays meet after reflection and refraction.
When farsighted, the focal point goes behind or ahead of the retina?
Behind