If you have hyperopia, myopia or astigmatism and then you develop presbyopia, then you would most probably need bifocal reading glasses. If you don’t understand what the words mean it is simply a condition where the eyes not only has difficulty in focusing on distant objects but has trouble focusing on nearby objects as well.
There are four kinds of bifocal lenses to choose from. The choice is really yours on which of the designs are more comfortable for your eyes. All of these designs are functional and succeed in correcting the blurring of vision.
The lenses which has a round segment in the lower area of the lens
The semicircular segment which looks like a big letter D in the lower half of the lens
The rectangular section placed on the lower half of the lens, and
The distinct division of the lens into an upper half and a lower half.
These four types make the distinctive divisions of the lenses and are not aesthetically attractive to most people. It is good that these four types can be integrated into progressive reading glasses where the distinct lines disappear and only one solid lens can be seen.
These bifocal reading lenses could also be tinted to fit the frames of favourite sunglasses and become reading sunglasses. However, this can be more expensive than the regular ones.
The choice of the type of bifocal reading glasses is for you to decide on as no matter what the decision may be, the function will remain the same. Only thing is, progressives are more expensive and the expense can increase if you have them tinted for sunglasses purposes. But if it means that you can drive at ease and go to the beach in comfort, then the cost could be ignored.
You can get these bifocal reading glasses from your optician or optometrist, but do not think that if you go to a pharmacy and just pick up a readymade pair that it would function in the same way. Remember that no two people are exactly alike and that is the same when it comes to reading glasses. Each eye has a distinction and careful measurements and calculations are needed to be made so that the lenses are custom made to fit your eyes. If you insist on getting the OTC type there may be risks like dizziness and nausea when you use them. That is caused by the measurements not fitting those of your eyes.
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