farsightedness

In the 13th century, Europe had hand-held convex lenses to overcome farsightedness but it was not until 200 years later that glasses for nearsighted people appeared.

Scientists believe that the reason women often wear more glasses than men is because women's arms are shorter than men, according to Healthday. A reason that seems unreasonable

A recent survey by the Vietnam Institute of Educational Sciences shows that nearly 25% of students are nearsighted. Approximately 15% of primary school students (grades 4 and 5)