6. I heard that there are now“bifocal/multifocal intraocular lenses (IOL)”.
What are they? Are they suitable for me?
As the name implies, bifocal
intraocular lenses (IOL) have a built-in second focal point that allows
near vision.
(multifocal intraocular lenses have three focal points that allows full
range vision, that is far, intermediate and near visions)
If implanted successfully, the patient becomes less dependent on reading
glasses after the surgery; some have even been able to see well at
distance and read newspapers without needing any glasses.
The idea of bifocal intraocular lenses is actually not new, and since
the 1990' s different companies have marketed them. We are now already
at the second generation, and these lenses produce less side effects
such as glare and halos than before. The main disadvantage of bifocal
intraocular lenses are that they are more expensive; they may still
affect distance vision a bit; and sometimes their near reading power is
overwhelmed by the wound healing process that creates secondary visual
problems such as astigmatism.
For the interested patients, our advice is that they should discuss
thoroughly with the doctor to see if they are good candidates.
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