According to Wikipedia article about Myopia:
Large amounts of near work while wearing glasses can be very detrimental to the eyes and can be a cause of worsening nearsightedness. The best way to avoid needing new lenses is by reducing the amount of near work, which forces the eyes into a continuous near-focusing position that eventually causes or increases myopia, by taking frequent breaks from near work, and by only wearing glasses when they are needed
Unfortunately, the article doesn't put any reference to scientific article to support this claim. Does anyone know any research confirming this? Does it mean it's best for people with low degree of myopia to read without using their glasses?