Who are toric intraocular lenses for?
Many patients have a graduation in which myopia or hypermetropia coexists with astigmatism (and presbyopia). In the past, there was no way of correcting astigmatism using intraocular lenses, so people with astigmatism who had cataract surgery had to continue wearing spectacles or have another complementary treatment such as LASIK.
Today there is a safe alternative for people with medium to high astigmatism (from one dioptre). As it is an optical defect which greatly affects quality of vision, patients are usually more satisfied by having the astigmatism corrected with a toric intraocular lens, as this allows them to eliminate dependency on spectacles.
How do toric monofocal lenses work?
The special feature of this design of intraocular lens is its ability to correct astigmatism. At the same time, it also corrects myopia and hypermetropia as necessary. As it is a monofocal lens, it only covers the refractive defect at a specific distance, so this correction is normally set for distance. As with standard monofocal lenses, monovision can be applied; in other words, one eye for distance and the other for near vision.
For patients with astigmatism who would like to correct the refractive defect in distance and near vision at the same time, the ideal solution is toric multifocal intraocular lenses.