Eye recap

Eye recap

How do our eyes focus light?

Short sighted

• Cannot focus on distant objects

• Focal point is in front of the retina

• Diverging lens focusses the light onto the retina

Long sighted

• Objects close appear blurred

• Light is focussed behind the retina.

• Converging lens refracts light before entering the eye

Multiple Choice

Which structure in the eye is responsible for the majority of refracting the light as it enters?

• pupil

• lens

• cornea

• retina

Multiple Choice

If you are short sighted you can see objects clearly that are...

• close up

• far away

Multiple Choice

If you are long sighted, objects far away appear...

• clear

• blurred

Multiple Choice

Which lens would you use to correct myopia (short sightedness)?

• Converging lens

• Diverging lens

Open Ended

How do contact lenses work?

Open Ended

What would happen if someone who was long sighted used the wrong type of lens.

E.g. if a long sighted person used glasses with a divergent lens.

Cataracts - What would their vision be like? Why?

Red-green colour blindness