It is reported that 20% more people are shortsighted than that in 10 years ago. The main reasons of shortsightedness is being looked at things nearby for a long time, such as read books, watch TV and operating computer. It is obvious that people’s life is seriously affected by nearsightedness. People are trying every means to prevent poor vision from developing worsely.
The ways to prevent and cure myopia are various. We can take 10 minutes after 1 hour’s work by looking at far away or doing eye exercises to relax eyes. There is one way has been approved to be most effective.That is wearing bifocals glasses.
The upper part of lenses is myopia lens which is used to see things far away. Your eyes will be more comfortable if you look through the down part of the lenses when you focus on the nearby object. You needn’t take time to prevent myopia as bifocals glasses enables you to do it when you are busy for work and study.