In modern cataract surgery, spectacle freedom is becoming more and more important. When someone has glasses with astigmatism and they want to become glass free then they need the best lenses for astigmatism – Toric IOL (Intraocular lens) implanted in their eyes. When we tell these lenses, patients want to know the Toric lens price in India. More on that later.
Emmetropia ( no need to wear glasses ) is still achieved for patients with myopic or hyperopic refractive errors by selecting the appropriate spherical lens power. Yet, 20% of patients who undergo cataract surgery have 1.25 diopters (D) of corneal astigmatism or more. It is these patients that need the toric lens.
Astigmatism is that condition of refraction where the point focus of light cannot form upon the retina due to the abnormal shape of cornea. In simple terms its a type of glass power. So, if you look at your prescription and it has something like this
-2.50 DS / -1.50DC X 90
then the second part of this prescription (-1.50 x 100) denotes astigmatism or a cylindrical power.
These lenses for astigmatism – Toric IOLs provide the opportunity to correct corneal astigmatism. They offer patients with pre-existing astigmatism optimal distance vision without the use of spectacles. Furthermore, the recent introduction of multifocal toric IOLs offers patient with pre-existent corneal astigmatism the opportunity not only to be spectacle free for distance vision, but also for near and intermediate vision.
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 cataract or phaco surgery between the toric lens and a regular monofocal or multifocal lens is that before 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 implant takes place during the cataract procedure, the surgeon rotates the IOL so the markings on the IOL gets aligned with the markings on the cornea to insure proper astigmatism correction.
Because of this customized tecnhology available to patients the toric lens price in india is higher than monofocal lenses.
Gives patients glass free vision for far inspite of having astigmatism or a cylindrical number.
If toric multifocal lenses are used then patients get glass free vision for both far and near.
More about Toric IOLs