1. What is the prevalence of presbyopia in the U.S.?
2. Miotics have few side effects.
3. Which of these devices uses pinhole optics (PHO)?
4. Which of these is not a pharmaco-refractive product?
5. What is the most common ingredient in current pharmaceutical drops for presbyopia being tested?
6. Which of these is a device?
Which is an active ingredient in PRX-100?