Intraocular lenses are used to correct refractive errors. These artificial lenses are implanted in one or both eyes of the patient. It will act as the eye’s crystalline lens, which is in charge of focusing light rays in order to receive clear images. Currently, there are two types of intraocular lenses: phakic and pseudophakic.
What are the differences between phakic and pseudophakic intraocular lenses?
Phakic lenses (ICL)
This type of lens is implanted between the crystalline lens and the iris, without the need to replace the natural crystalline lens. They are mostly used for young people with refractive problems.
Its function is similar to that of a prescription contact lens; its use is recommended for those who do not suffer from eyestrain, for those who cannot be operated with LASIK technique due to thin cornea or for those whose myopia is higher than 6 diopters associated, or not, with astigmatism.
These lenses, on the other hand, replace the patient’s natural crystalline lens. This procedure is used as a treatment for pathologies such as cataracts or presbyopia.
This is the case when the patient’s crystalline lens has become opaque, loses accommodation and therefore it is difficult to focus and see clearly and transparently. But if the patient also has refractive problems, another lens can be placed to correct the prescription problems.
Each type of lens has a different typology according to the focus needed:
- Bifocal. It has two focuses, one for near vision and the other for distance vision.
- Trifocal. They can focus three distances: near, far and intermediate.
- Toric. To correct refractive defects combined with astigmatism.
- Extended focus. This type of lens is for good distance and intermediate vision.
How is the procedure to correct eye problems with intraocular lenses?
The procedure is very fast. In cases of pseudophakic lens implantation, the procedure is the same as for cataract surgery. Local or topical anesthesia is used. The lens is implanted through a small incision with the aid of an injector.
There is no need for sutures and aftercare only requires the use of antibiotic and anti-inflammatory eye drops. ICL implantation is performed under local anesthesia and sedation and the patient can resume normal life 24 hours after surgery.