DNL SPC-English /1ère

The Eyes and vision defects

Questions:

1. Introduce and comment on this documents.

2. Why is it uncomfortable (and not recommended) to look at objects held nearer than 25cm from

the eyes?

3. Where are the image formed in uncorrected myopic and hyperopic eyes? How can we explain

those vision’s defects ?

4. How different are concave and convex lenses? (a ray diagram is expected)

5. How can we correct myopia and hyperopia?