Support for Special Cornea Needs
Corneal Ring Inserts Toronto
The Corneal Ring Inserts procedure is performed to correct the bulge of the cornea and flatten the steep portion of the cornea, thus improving vision irregularities. Unlike the IOLs used during cataract surgery to replace the lens of the eye, Corneal Ring Inserts do not replace the cornea; rather, they are implanted within the existing cornea to provide keratoconus treatment. Corneal Ring Inserts are made from the same material used to make lens impants (or intraocular lenses) and do not have much risk of negative reactions.
The Corneal Ring Inserts Procedure
The procedure requires making only a small incision with a laser before the Corneal Ring Inserts can be placed to reshape the weakened cornea and restore vision. Our surgeons are trained extensively in this type of corneal procedure.
During the surgery, our surgeons will form a channel in the stroma (the thickest layer in the anatomy of the eye) and insert a crescent-shaped Corneal Ring to flatten the cornea and correct vision. The entire procedure takes only about 15 minutes. The surgery is intended to be permanent, but it can be reversed at any time. Contact our Toronto, Ontario practice to learn about this marginally invasive keratoconus treatment.
Corneal Cross Linking
Vision in patients with keratoconus is typically blurry, even with glasses, due to the stretching or bulging of the cornea. The stretching continues to progress until the patient reaches his or her 30s’s or early 40’s. The corneal cross linking procedure serves a purpose of stemming the progression of keratoconus by stiffening and bonding the fibers in the cornea with the use of ultraviolet light.
The corneal cross linking keratoconus treatment can be extremely beneficial. For the first time, we now have an effective treatment that prevents keratoconus from getting worse. This treatment, when teamed together with Corneal Ring Inserts and laser shaping of the cornea, can often lead to a dramatic improvement in vision without the need for a corneal transplant.
The Corneal Cross Linking Procedure
The welding of the fibers that occurs during the corneal cross linking procedure has little effect on the clarity of the cornea, yet has been proven in many European studies to slow down and even halt the progression of keratoconus in 90% of cases. The procedure itself is simple: vitamin B2 is applied to the cornea, followed by exposure of the cornea to ultraviolet light for a short time. The light activates molecules called free radicals that act to weld adjacent fibers in the cornea, much like a coiled electrical wire. This process is similar to the one used in the creation of many of our modern polymers that are used to make many household plastics. It is also similar to the bonding procedure that dentists use to attach materials, such as those used in fillings, to our teeth. The whole process takes about one hour.