1. What are they (how do they work)?
2. When were they invented and where?
3. What is the difference between contact lenses and eye glasses.
4. How are they made, and is the process different for convex and concave lenses?
5. What are other options than lenses to correct vision (name at least two and describe whether you think eye glasses/contacts in the future.

Choose Image Concave Lens Concave Lens 2 Convex Lens Convex and Concave Lenses Convex Lens 2 Convex Lens 3 Convex and Concave Lenses 2

joshuale@lewis.edu

Josh Espinoza