How Do I Know Which Lens To Choose?
The cataract surgery procedure is a procedure performed in a hospital on an outpatient basis. Commonly used process for cataract surgery is phacoemulsification. In the process the eye is numbed with drops or injection. Next, an operating microscope is used to make small incisions inside or near the corneal surface of the eye. A thin ultrasound probe, is inserted in to the eye which produce ultrasonic vibrations. These ultrasonic vibrations break up the clouded lens. The broken tiny pieces are suctioned out using the ultrasound probe. At last, when all the above steps are completed an artificial lens is placed in to thin capsular bag that the cataract previously occupied. The new lens implanted helps the eye to focus and see clearly after surgery.
What are intraocular lens?
Intraocular lens is a lens implanted in the eye during the cataract surgery procedure. The commonly used intraocular lens is pseudophakic Intraocular lens which replaces the cloudy lens of the patient’s eye. The pseudophakic IOL has the light focusing function to provide a clear vision to the eye. The second type of intraocular lens used is called a phakic intraocular lens (PIOL). This is a type of lens which is placed over the existing natural lens. They are mainly used in refractive surgery to changes the optical power of eyes as a treatment of near-sightedness.
Intraocular lens has a small plastic lens having plastic side struts. The side struts are called haptics, they function to hold the lens inside the capsular bag of the eye. They were originally made from inflexible material but know flexible materials are also used. The mostly implanted intraocular lens is fixed monofocal lens. They match to the distance vision of the eye. The second type of lntraocular lens that is implanted in cataract surgery is multifocal IOLs. They provide a multifocussed vision to the patient i.e. vision at far and reading distance.
Unifocal lenses or the customarily used lenses
Unifocal lenses functions to focus at just one distance. It can be near, far or intermediate distance. Only one of these three can be selected and the focus will not change after surgery. With these lenses, two different unifocal lenses can be chosen for each eye so as to see two different distances. This is also called monovision. It is useful but it takes some time for the patient to get used to it. For patients with cataracts in both eyes, a Monofocal Intraocular Lenses are the best.
Advantages of Unifocal lenses
The he cost of standard unifocal lenses is fully covered by Medicare and private insurance.
People who go for unifocal lens can wear glasses for driving especially at night. It also preserves the near vision in low light.
For patients with astigmatism toric lens are the best choice. There are premium kind of lenses available at an additional cost and are not covered in the medical insurance.
Disadvantages of unifocal lenses
If you are the one who suffer from both your distance vision and your near vision, than you’ll still need glasses. If you use distance vision correction than, you will need reading glasses to improve your near vision and vice versa.
How to choose the type of lens for cataract surgery?
Cataract surgery places a new kind of lens in your eye. The surgery gives new life to the patient as both nearsighted or farsighted individuals can have an excellent vision without glasses. The time when cataract surgery started all the patients were given only the same type of lens. However, over a decade new lens technologies have developed offering a choice of intraocular lenses. The choice of the lens gives additional benefits, but the choice are dependent in the type of implant surgery you are going to have. The biggest hurdle that comes while choosing intraocular lenses is not trial. It means before the cataract surgery there is no way to try intraocular lenses and see which one you like the best.
Therefore, focus should be given on the benefits of the artificial lens in correspondence to their type of usage. When choosing an intraocular lens the type of lens and the power of the lens are to be assessed. Additionally, personal factors are also to be determine like the activities that are to be done without glasses, is it comfortable for you to pay the extra amount for a lens that does more than the standard lens, and the distance till which you can see clearly without glasses i.e. near, intermediate, or far.
Further, some medical tests are done to determine the power of the lens that is to be implanted. The eye lens is measured. The measurements are done to decide the power of the lens that is to be implanted. There are slight chances of inaccuracies but almost in all cases the lens implanted gives you the required power and clear vision.
Risks associated with implantation of Intraocular lens during cataract surgery
Like with any other surgery intraocular lens implantation during cataract surgery carried several risks. The associated risks are infection, loosening of the lens, lens rotation, inflammation and night time halos. However, the procedure is a lot more safer and successful in today’s ear. The patients who undergo cataract surgery can have reduced dependence on glasses, their visions becomes clear which makes easy for them to carry out their work and daily activities.
Cataract surgery is a safe and successful procedure one can for easily. The only care you have to take is ask your doctor to implant a intraocular lens that bests suit your eye.