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Multifocal Lenses

What are Multifocals?

Multifocals with two distinct viewing areas to aid in seeing better at distance and reading are bifocals.  Multifocals with three distinct viewing areas to aid in seeing better at distance, middle, and reading are trifocals.
Whether it is a bifocal lens or a trifocal lens, the distinct viewing areas are separated by noticeable lines within the lens.  Depending on the distance of the object you are looking at, it will determine what distinct viewing area you will look through to see the object clearly.
For example, a person who requires prescription eyeglasses to see clearly at a distance and while reading, may be prescribed a pair of bifocal eyeglasses.  The top portion of the lens will correct the difficulties for seeing objects at a distance and the lower portion of the lens will correct the difficulties for objects up-close.  Trivia:   Bifocal eyeglasses date back to the days of Benjamin Franklin!
While wearers quickly adjust to the lines separating the different viewing areas, the lines can be a noticeable distraction within the lens itself.  The lines can be eliminated using a newer lens technology called progressive lenses.  Progressive lenses are almost always a better option.  To learn more about the advantages of progressive lenses please visit the section called "Progressive lenses" or call us at Avery Ranch Eye Care