How do contact lenses work? The simulation allows young scientists to explore focal length and lens type to see how and why contact lenses work. Pupils control the focal length for an eye and a lens, the type of lens, and the distance the person wants to see. A graphic of how light is traveling and the point at which it converges appears for each trial.

Concepts

lenses, convex, concavity, eyes

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Additional Tags

science

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Instructional Ideas

• Invite an optometrist to speak to the class
• Compare the difference in how contact lenses and glasses work to improve vision; why are some people a good candidate for one but not the other?

Classroom Considerations

• Requires a free CK-12 account to access the interactive

Pros

• Includes in-simulation challenge questions
• Offers a video walk-through of how to use the simulator

Cons

• None

Common Core

RST.6-8.4 RST.9-10.4 RST.11-12.4