La cataract is the total or partial opacity of the crystalline that prevents light from focusing on the retina. The Cataracts it can be corrected by replacing the opacified lens with an intraocular lens (IOL), and they perform their function of accommodation and focus.
En Área oftalmológica Avanzada We explain what intraocular lenses for cataracts are and the types that we can find.
What are cataract intraocular lenses?
The lens is the natural lens of the eye whose main function is to allow focus of objects at any distance.
Over the years, the lens loses its transparency and becomes opaque, causing greater difficulty in focusing on objects and a blurred vision.
To treat cataracts, the lens is replaced by an intraocular lens using cataract surgery. The intraocular lenses (IOLs) They are artificial and small lenses that, like glasses, have different powers and graduations for their focus.
To calculate the focus measurements of the intraocular lens, the ophthalmologist must measure the length of the eye and curvature full cornea.
Types of intraocular lenses (IOLs)
different types of intraocular lenses that are differentiated by number of foci and approach needs of each patient.
Intraocular lenses for cataracts are classified as follows:
single vision
Monofocal intraocular lenses have single bulb which corrects distance vision. Patients who are candidates for these lenses will see perfectly at a distance, but may need to wear glasses for near and intermediate vision.
Multifocal
Multifocal intraocular lenses for cataracts allow to focus correctly to several distances. They may be:
diffractive
they have two spotlights and a diffraction grating formed by concentric rings.
The characteristics of this lens allow light rays to be directed at two different focuses at the same time, creating a focal point for the far distance and a focal point for the near distance.
Refractive
One part of the lens improves near vision and another part improves distance vision. These lenses have an important disadvantage, since if the pupil shrinks too much, the most effective area of the lens will be the central, and this will impair near vision.
Hybrids
These intraocular lenses for cataracts are prescribed when the patient also suffers from presbyopia very high or some irregularity in the cornea, usually combine different geometries, for example, diffractive and refractive.
trifocal lenses
All the trifocal IOLs do three spotlights and allow to focus correctly to corta, medium y long distance.
These lenses offer perfect distance vision, clear intermediate vision and acceptable near vision. The advantage of these lenses is that the patient is more independent of the glasses y contact lenses for near and intermediate vision.
Toric lenses
If the patient suffers from astigmatism, this defect can be corrected in cataract surgery. For this, it is necessary to use the toric lenses, which can be classified into intraocular lenses toric monofocals, toric bifocals y toric trifocals.
En Área Oftalmológica Avanzada We are experts in all types of lenses. Call now and make an appointment with any of our specialists to answer all your questions. We will be happy to help you!
