Talk! If you can't read.
One day, a man came to see an optician.
Patient: Doctor, could you make me a pair of reading glasses because I can't read without it.
Doctor: OK, then. I'll be happy to help you.
So, the doctor prescribed for him reading glasses. But then the man came to the clinic again..
Patient: You must have gave me a wrong prescription!
Doctor: Why? I'm sure i gave you the right one.
Patient: My vision doesn't improve and I still can't read on using it.
Doctor: That is strange. Anyhow, do you know how to read?
Patient: That's why I asked you to prescribe me reading glasses!
Oh, dear! A pair of reading glasses never can help someone who is simply does not know how to read. So, the man above has a disease called 'illiteracy'....not so a disease after all. He is called as illiterate. Actually, millions of people all over the world are illiterate. Even in industrialized western countries as UK and the USA, approximately 20% of the population has 'low literacy level'. Surprised, huh?