People may have some difficulty to focus on the close objects when they arrive at the age of 40, so most of them would choose to wear the presbyopic glasses to aid the reading. However, if they are at the same time with nearsighted or farsighted sight, they find that they have to change the normal eyeglasses and presbyopic eyeglasses frequently if the vision is changed from the far to near and near to far frequently. It is very inconvenient and will make you feel headache. The invention of bifocals is a great help to solve the above problems, making the vision changing with only one pair of glasses, with the top part for the distant view and the bottom part for the near view. When people becoming older, they discover that even the objects at the intermediate distance is blurry, so they turn to the trifocal eyeglasses with three focal points and the added one is for intermediate view. The trouble is there are distinct and visible dividing lines between different areas, so it is an obvious sign showing that you are presbyopia. With the rapid development in the glasses making industry, the multi-focal sunglasses, also have the name of progressive bifocal eyeglasses are available, which do not influence your appearance at all but providing an clear sight at any distance. When the lenses are tinted with some colors, there comes to the progressive bifocal sunglasses with the function of UV rays prevention, thus to protect eyes from hurting.
However, when you first try on the progressive bifocal sunglasses, you may find it a little different from the way you wear normal sunglasses because your peripheral vision, especially the horizontal vision, may be limited due to the power changes at the edge of the lenses. But there are methods to help you to be accustomed to the progressive lenses quickly. Firstly, you are suggested to wear the new sunglasses all day long during the daytime. Secondly, turn the head to the target object to focus but not only moving your eyes to the object. Finally, you can put your eyes as close to your face as possible in the premise of keeping comfort. The guidelines above are advantageous to help you to get used to the progressive bifocal sunglasses. Some people may only need several hours’ adaptation time, though some people may need several weeks. In the end, I am sure almost everyone is able to enjoy sunglasses of this type. However, if you indeed have difficulty in adapting the sunglasses, you can contact your doctor for an evaluation on your eyes.
Progressive bifocal sunglasses are the most advanced and comfortable sunglasses available nowadays, with the help of which presbyopic people can enjoy the world at any distance at ease if you are really accustomed to them.
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