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Toric IOL

Toric IOL

In modern cataract surgery, spectacle freedom is becoming more and more important. Emmetropia, ( no need to wear glasses ) can be achieved for patients with myopic or hyperopic refractive errors by selecting the appropriate spherical lens power. However, approximately 20% of patients who undergo cataract surgery have 1.25 diopters (D) of corneal astigmatism or more.


Astigmatism is that condition of refraction where the point focus of light cannot be formed upon the retina due to the abnormal shape of cornea.

Toric IOL:

Toric IOLs provide the opportunity to correct corneal astigmatism, offering patients with pre-existing astigmatism optimal distance vision without the use of spectacles or contact lenses with a cylindrical correction. Furthermore, the recent introduction of multifocal toric IOLs offers patient with pre-existent corneal astigmatism the opportunity not only to achieve spectacle independence for distance vision, but also for near and intermediate visual acuities.

toric IOLs can correct astigmatism because they have different powers in different meridians of the lens. They also have alignment markings on the peripheral part of the lens that enable the surgeon to adjust the orientation of the IOL inside the eye for optimal astigmatism correction.

The difference in surgery between the toric lens and a regular monofocal or multifocal lens is that just prior to cataract surgery, the surgeon places temporary markings on the patient’s cornea that identify the location of the most curved meridian of the front of the eye. Then, when the toric IOL is implanted during the cataract procedure, the surgeon rotates the IOL so the markings on the IOL are aligned with the markings on the cornea to insure proper astigmatism correction.

Benefits of Toric IOL •

  • Reduce or eliminate corneal astigmatism and significantly improve uncorrected distance vision
  • Provides spectacle independence for distance vision




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