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Read The Small Print With Bifocal Contact Lenses

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					Read The Small Print With Bifocal Contact Lenses
by: Eye Contact Guide

Do you find yourself cursing food manufacturers for making the writing
smaller on cans these days? Are you finding it harder to read a menu in a
restaurant? Do you have to hold the newspaper at arms’ length to read it?
These are all clues that you might have a condition called presbyopia.

What Is Presbyopia?

I’m sorry to break this to you, but it’s the age-related process that
makes you unable to read the small print!

Astigmatism, nearsightedness and farsightedness are to do with genetics,
eye disease or trauma. Presbyopia is thought to be caused by changes to
the proteins within the lens of your eye. These changes make the lens
harder and less flexible. The muscle fibers controlling the lens are also
ageing. The combination of these means that your eye finds it harder to
focus on things close-up. It’s horrible getting older!

The answer to Presbyopia is bifocal lenses. These used to be only
available in spectacles – but if you’re a contact lens wearer, the good
news is that now you can swap to bifocal contact lenses.

What’s The Difference Between Bifocals And Multifocals?

Just like bifocal spectacles, bifocal contact lenses have two
prescriptions in the same lens. Multifocal contact lenses have several
prescriptions in each one, blended to give a smooth alteration to the
vision correction.

�?Multifocal’ is the word also used to describe all lenses with more
than one prescription, including bifocals.

How Do Bifocals Work?

It depends on the design of the lens. There are two main groups.

1. Translating Bifocals

These work like bifocal spectacles. Each lens has two prescriptions. The
top half corrects your long-distance sight and the lower half corrects
your near sight. You look through one or the other, depending on which
distance you wish to see clearly.

When you’re wearing bifocal spectacles, your eye moves and the lenses
stay where they are. It works the same way with bifocal contact lenses.
Most �?translating’ bifocal contact lenses are gas permeable. They are
smaller than soft contacts and are rigid. They float on your eye, with
their lower edge resting on your lower eyelid. That way, when your eye
looks down, the lens stays where it is instead of traveling with your
eye. This lets you look through the bottom half, which corrects your
nearsightedness.
2. Concentric Rings

This is a type of bifocal contact lens which has one kind of prescription
in the middle and one or more circles of differing prescriptions
surrounding it. This sort of bifocal can be either a soft lens or a gas
permeable one.

Will I Be Able To Wear Bifocal Contact Lenses?

Bifocal contact lenses are not a new innovation but the original types
were not well liked or tolerated. New technology has given rise to much
more successful designs and a wider variety of options. So if one type of
bifocal contact lens doesn’t work for you, another type might. These
techniques are often successful –

•Wearing a nearsightedness prescription lens in one eye and a
farsightedness one in the other.

•A single prescription lens in one eye and a Multifocal one in the other.
Your eye care Doctor will work with you to see which method and which
bifocal contact lenses work best for you.

Article provided courtesy of Eye Contact Guide - a premier resource for
everything eye related including contact lenses, Acuvue contacts and
theatrical contacts.

				
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posted:11/5/2011
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