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      Bifocal prescription glasses are made especially for those individuals that are nearsighted and farsighted at the same time. Such individual with dual power in their eyes opt for those glasses online that are best fit for presbyopia.
      However, the intermediate distance of bifocal glasses has poor visua l effect. Produce a “image jump” phenomenon and have a poor appearance. Due to its own major short comings and the popularity of progressive lenses, bifocal lenses have been basically eliminated.
      Bifocal prescription glasses are made especially for those individuals that are nearsighted and farsighted at the same time. Such individual with dual power in their eyes opt for those glasses online that are best fit for presbyopia.

      For the crowd

      Progressive lens is suitable for the following crowd:
      ▪ Myopia control lenses for teenagers -- used to alleviate visual fatigue and control the development speed of myopia.
      ▪ Anti-fatigue lenses for adults -- for teachers, doctors, and people who use too much proximity and computers to reduce visual fatigue at work. And it eliminates bothersome "image jump" caused by bifocals.
      ▪ Progressive lenses for middle-aged and elderly -- a pair of glasses which is easy to see near and far. In addition, they have the same beautiful appearance as single lenses.

      How to get used to progressive lenses

      ▪ Look far, then focus on something closer as you lower your eyes to the mid part of the lenses.
      ▪ Then, take a book and look through the bottom of the lenses.
      ▪ Next try moving your head and not just your eyes up and down and side-to-side as you look through the different fields of vision.
      ▪ Remember to use your head to point towards where you wish to look.
      ▪ Please note that if you look through the corners of the lenses, they will always seem a bit blurry. That’s completely normal!

      Notices for wearing

      1.When choosing a pair of glasses, you'd better choose a large frame. Because the lens is divided into far, middle and near zones, only large frames can ensure a wide enough for near zone. It is best to use a full frame, due to the larger the lens, the thicker the edge of the lens, the full frame groove can cover the thickness of the edge of the lens.
      2.Generally, it takes about a week to adapt, but the length of the adaptation period varies from person to person. When you are dizzy, you should walk slowly. Since both sides of the lens are astigmatic disorder area, it is not clear to see objects on both sides through the light of the eyeball, and it is necessary to turn the neck and the eyeball to see at the same time.3.When going downstairs, the glasses should be lower, try to see from the distance zone.