What is a Tetraflex™ Intraocular Lens?
Tetraflex™ is an intraocular lens used for replacing the cloudy lens (cataract) inside the eye during cataract surgery. The Tetraflex™ lens is designed to move inside the eye so that your eye will be able to focus from distance to near. Tetraflex™ is manufactured by Lenstec.
What is Presbyopia?
Presbyopia occurs when we reach our forties. It is due to the fact that our own natural lens loses its ability to focus from distance to near. This gradually progresses and gets worse through our fifties into our sixties. People have to wear reading glasses or bifocals if they want to see up close or if nearsighted have to take their distances glasses off in order to a see or read anything up close.
What Happens with Our Vision After Cataract Surgery?
In the past, a single vision intraocular lens was placed inside the eye. The patient would still need to have reading glasses after cataract surgery. They may have good distance vision as long as they did not have any astigmatism but would not see well up close.
There are now options that allow a person to see both at distance and near. There are two types of theses lenses.
Multifocal lenses have a bifocal type of technology that provides vision at distance and near.
A single power lens that moves inside the eye as the eye focuses. As the lens moves forward the effective power of the lens becomes stronger for near vision.
How Does the Tetraflex™ Intraocular Lens Work?
The Tetraflex™ lens is designed to flex inside the eye. It is placed inside the capsular bag in the flat position for distance vision. When the eye focuses on a near object, the Tetraflex™ lens uses the natural focusing in the eye (eye muscles and vitreous pressure) to move the lens slightly forward inside the eye. This changes the effective strength of the lens and provides clear near vision. As you focus back to distance, the lens moves back allowing for clear distance vision.
You do not feel the lens move inside your eye as with your own natural lens.
Results of the Tetraflex™ Intraocular Lens
The pool of evidence so far has been that 90-95% of patients do not need glasses for their daily activities. Most people will be able to drive, watch TV, read, work on a computer, play golf, and do their makeup without glasses. You may need a pair of reading glasses for small or fine print in dim light.
Can a Person do Anything After Surgery to Improve Vision?
Yes, the muscles inside your eye that work with focusing can be strengthened with exercise. With permission from your eye doctor, you can try:
In good reading light, look at magazine or book, something with black writing on a white background at a comfortable reading distance.
Start reading words of any size that you can see clearly and then concentrate on one particular word.
While looking and concentrating on that one word, very, very, very, slowly bring the page closer towards you until the word becomes blurred.
Return to the original distance with the page and repeat the process.
Continue like this until your eyes or brow start to ache or for about 5 minutes, whichever comes first.