What are BIFOCAL lenses?
The bifocal lens was born in order to correct presbyopia or tired eyesight; It is not a disease as many people think, but the natural evolution of the human eye that, due to the passage of time, loses its ability to focus. It usually appears at the age of 45 and one of the symptoms that most characterizes presbyopia is difficulty reading small print up close.
Today we find different ways to solve presbyopia, from monofocal to progressive, including bifocals, which still have great recognition among users due to their tradition, despite the fact that they are quite uncomfortable.
When to wear bifocals?
Which users are recommended bifocal lenses. In general, today bifocal glasses are no longer recommended as there is a more advanced technology that is progressive glasses. Both progressive and bifocal lenses are used for:
Presbytery: those whose lens has lost flexibility and cannot be accommodated due to age. As a result of this loss of flexibility, the eye cannot properly focus on closer objects and perceives them as blurred.
Presbyopia who also have myopia, hyperopia or astigmatism: with these lenses you can correct not only presbyopia or tired eyesight but also other ametropia. In other words, it is used for those users who, in addition to suffering from presbyopia, have difficulty seeing well at a distance.
For users over 40 - 45 years old: it is from this age when presbyopia begins to manifest. Those who tend to experience tired eyes earlier and cannot see well up close at this age are hyperopic people.