Astigmatism can be corrected during cataract surgery in two ways. For low levels of astigmatism, it's common to do a limbal-relaxing excision during the cataract procedure. This relaxes tension around the cornea and allows it to expand from an oval into a circle. For higher levels of astigmatism, a high-quality toric lens can be implanted. This lens implant corrects astigmatism very accurately with a non-invasive procedure.
Dr. Cavanaugh: So there's really several options to crack
astigmatism. Traditionally you can do it with
glasses, but in this day and age of where we like to get
people out of glasses we can have surgical options.
And there's really two things that we do for
astigmatism correction and
surgery. One of the most common ways for low levels
of astigmatism is to do what's called a, Limbal-
relaxing incision and these are tiny little
incisions we do during the cataract procedure at the junction of the white
part and the colored part of the eye to allow the
cornea to expand from an oval into a circle. It relaxes
the tension in the cornea that's pulling it around
and allows us to correct that very nicely. So those are, those are
really a nice adjunct to the procedure.
The patients that have a higher level of astigmatism
we have toric lens implants, and toric lens
implants are very high quality lens implants that
have the astigmatism correction ground in to the tiny lens implant. And
keep in mind that one of those lenses is smaller
than your pinky finger. So it's a lot of
technology in a small little lens. We simply implant the
lens, align that to the direction in the astigmatism and it corrects
the astigmatism very accurately from the inside of
the eye with a very non- invasive procedure.