Look at A on the vocabulary section and answer the questions about medical technology.

1. What did Arab scientists probably invent? glasses 
2. What began to be used in 1896 to enable doctors to take photographs of the inside of people’s bodies?
3. How did the ancient Egyptians help disabled people to walk?
4. What alternative to glasses became popular in the 1960s and 1970s?
5. How could disabled people move around as early as 1500 to 1600?