Eye Defects, Hearing and Balance
Part 2 — when the eye cannot focus, and how the ear hears and balances.
In this lesson you will
- State the cause and correction of myopia, hypermetropia, presbyopia, astigmatism and cataract
- Draw ray diagrams for myopia and hypermetropia and their correction
- Trace the path of sound through the ear and explain how the ear maintains balance