In modern cataract surgery, spectacle freedom is becoming more and more critical. When someone has glasses with astigmatism and wants to become glass-free, they need the best lenses for astigmatism – Toric IOL (Intraocular lens) implanted in their eyes. When we tell this to patients, they want to know the Toric lens price in India. Because of a few varieties of toric lenses, the cost of toric lenses can vary, and more about that later.
Toric IOLs or intraocular lenses are one type of IOL. Others being
We achieve emmetropia ( no need to wear glasses ) 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 a condition of refraction where the point focus of light cannot form upon the retina due to the abnormal shape of the cornea. In simple terms, it's a type of glass power. So, if you look at your prescription, 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 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 spectacles. Furthermore, the recent introduction of multifocal toric IOLs offers patients with pre-existent corneal astigmatism the opportunity to be spectacle-free for distance vision and near and intermediate vision.
Toric IOLs can correct astigmatism because they have different powers in different lens meridians. They also have alignment markings on the peripheral part of the lens that enables 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 occurs during the cataract procedure, the surgeon rotates the IOL, so the markings on the IOL align with the markings on the cornea to ensure proper astigmatism correction.
Because of this customized technology available to patients, the toric lens price in India is higher than monofocal lenses.
More about Toric IOLs