Bill Nye, Eyeballs

    Today we watched a Bill Nye video about eyeballs.

We also had questions to go along with the video,  try and solve them, (answers below).
1.Nerves connect the eyeballs to the ________________
2.The iris controls the amount of _____________ that goes into your eyes.
3.The eye gets protection from the eyelid/eyebrow(Choose one).
4.The ____________ nerve is about 20cm long.
5.If the eye is out of focus then images appear__________.
6.The ____________ changes shape sothat the eye can focus.
7.Rods and cones are the cells/nerves that make the image on the retina
8.Cones allow the eye to see___________ and bright light.
9.Colourblindness means there is plenty/not enough light sensitive pigments on the retina.
10.Being________ dose not stop people from doing things like walking or playing.
11.The eyes__________ to see how for away or how close an object is.
12.If you lose an eye, a doctor can make an_________eye.
13.Above the eyelid are glands that produce__________.
14.An optical___________is your brain and eyes playing tricks on you.
15.The eyeball is the___________of a ping pong ball.









ANSWERS
1.brain
2.light
3.eyelid
4.optic
5.blurry
6.lens
7.cells
8.colour
9.plenty
10.blind
11.cross
12.artifical
13.tears
14.illusion
15.size