About 4 million people in America are developed into presbyopia with the natural aging, especially when they are at the age over 45. You cannot escape the process, either, because it is a natural phenomenon, earlier or later, so you are suggested to wear either presbyopic glasses, or bifocal glasses, or trifocal glasses or progressive glasses. If you are an outdoor enthusiast, you had better wear the relative sunglasses, among which bifocal reader sunglasses are the most advanced ones for they can provide three important functions. Firstly, they are suitable for people with presbyopic or nearsighted/farsighted problems. Secondly, as they are one kind of sunglasses, it is sure to be helpful to prevent harmful UV rays, and even it is more effective in UV rays and harsh glare blocking. Finally, this kind of glasses is extremely suitable for reading as the words can be magnified to some extent for better reading.
The fundamental reason why old people get presbyopia easily is due to the crystalline lens losing its elasticity after using them for a long time, though you can do something to delay the process like looking into distance regularly, rotating eyeballs every other time, squinting frequently, avoiding reading for a long time, or washing eyes with the cold water. These are all effective methods to postpone the coming of presbyopia.
If you are really caught by the disgusting problem, you have to take measures to protect them. Presbyopic glasses may be the most suitable glasses to solve the presbyopia, but the condition is old people always have the nearsightedness, farsightedness or astigmatism at the same time. The single vision presbyopic eyeglasses are not enough, so the bifocal eyeglasses come into people’s sight with the characteristic of having two focal points, where focal points are also called lens powers. The lenses of bifocal eyeglasses are designed for distant view in the top of the lenses and for near view in the bottom of the lenses. Sometimes, the bifocal reader eyeglasses with the magnification function are needed as old people cannot see clearly even with the bifocals, so they acquire the object magnification to aid the reading in a better way.
When in summer, the sunlight is quite strong radiating some harmful rays to hurt people’s eyes. However, people would like to have a sun bathe or do some reading or fishing outside. Then the sunglasses are quite necessary, and for some people who have bad eyesight, especially the presbyopia and some other eye problems simultaneously, the bifocal reader sunglasses are of course the best choice.
Many old people do not pay much attention to their presbyopia problem since they think it is normal and everyone has to experience it. The result is they choose their glasses or sunglasses informally sometimes buying the cheap ones in the roadside booth, because they think this kind is also helpful to read something at a near distance. Actually, it is wrong. Old people also have different degree in both eyes needing the same accurate correction. The cheap presbyopic eyeglasses or sunglasses have the same standard and low quality. Long time wearing will cause headaches. So you are better to choose the bifocal reader sunglasses to help you see clearly and comfortably.