Cataract Lens Implants for Astigmatism Correction

Cataract lens implants for astigmatism correction after cataract surgery are an important part of helping patients see clearly without needing glasses for distance vision. Birmingham Cataract Surgeon Marc Michelson, M.D. of Alabama Eye & Cataract Center commented on correcting astigmatism after cataract surgery with toric lens implants. “Most cataract patients know from their eye exams or eyeglass prescriptions that they have some amount of astigmatism. Sometimes they don’t realize that it is important for their cataract surgeon to correct that astigmatism in order to get the best visual results after cataract surgery. If we don’t correct that astigmatism they just won’t see as well as they should at distance without needing glasses or even a second procedure called and LRI,” explained Dr. Michelson.

Astigmatism is a common refractive eye condition that that is most often due to an uneven curvature of the cornea. If the cornea were perfectly shaped, it would have a spherical round even shape, like a basketball. In eyes that have astigmatism, the cornea is typically curved more like an oblong, football-like shape, similar to the shape of the back of a teaspoon. “Depending on the degree and orientation of the unequal curvatures, astigmatism can cause mild or even severe blurry vision,” explained Dr. Michelson.

Patients with cataracts and who are in need of cataract surgery have three choices when considering how to correct their astigmatism. First, patients can simply choose to be dependent on wearing eyeglasses after cataract surgery in order to correct astigmatism. Second, if appropriate, some patients may opt to have an additional surgical procedure called Limbal Relaxing Incisions (LRI) or third, patients can elect have an astigmatism correcting toric lens implant in which the astigmatism correction is incorporated into the lens prescription just as in eyeglasses. “Toric lens implants are placed in the eye in exactly the same manner as ordinary lens implants at the time of cataract surgery and correct the astigmatism as part of the cataract surgery operation,” further explained Dr. Michelson. If you or someone you know has cataracts or is considering cataract surgery, and has astigmatism please feel free to learn more about astigmatism correction after cataract surgery by calling Alabama Eye & Cataract Center in Birmingham at 205-930-0930, visiting Alabama Eye & Cataract Center or facebook.com/michelsonlaservision.

Michelson Laser Vision and Alabama Eye & Cataract Center are leading eye care centers in Birmingham staffed by a team of specialists including eye doctors who are fellowship trained cornea specialists and cataract and lens implant specialists-all board certified Ophthalmologists & Corneal Specialists-as well as Optometrists, Opticians, technical and administrative staff who provide eye examinations for adults and children, cataract surgery and intraocular lens implants (IOL), laser eye surgery such as LASIK for laser vision correction, diagnosis and treatment of cornea disease including cornea transplants, care for diseases of the retina including diabetes and age related macular degeneration and diagnosis and treatment of glaucoma and fitting of eyeglasses and eyewear..

Birmingham Doctor on Glaucoma & Marijuana

Birmingham eye doctor Tyler Hall, M.D. explained the use of medical marijuana to treat glaucoma and other diseases. “First, patients need to know that glaucoma is an eye disease in which the optic nerve becomes damaged over time-most often from an elevated intraocular pressure (IOP)-or high pressure in the eye which initially decreases or limits their peripheral vision. If we do not detect, diagnose and treat it early enough glaucoma can lead to blindness,” explained Dr. Hall. “The most common approach to treat glaucoma s to lower the intraocular pressure with eye drops, laser treatment, oral medications and sometimes surgery depending on the type of glaucoma and how severe it is,” he further explained.

The idea that marijuana can be helpful in treating glaucoma dates to the 1970s. Studies conducted then showed that smoking marijuana lowered the IOP of people with glaucoma. As a result of this research, additional studies were conducted examining whether marijuana or its active ingredient, a compound known as THC, could be used to keep IOP lowered. This research was supported by the National Eye Institute, a division of the National Institutes of Health. The research found that when marijuana is smoked or when a form of its active ingredient is taken as a pill or by injection, it does lower IOP. However, it only lowers IOP for a short period of time-about three or four hours. This short period of time is a major drawback for the use of marijuana as a glaucoma treatment. Because glaucoma needs to be treated 24 hours a day, you would need to smoke marijuana six to eight times a day around the clock to receive the benefit of a consistently lowered IOP. Because of marijuana's mood-altering effect, smoking so much of it daily would leave you too impaired to drive, operate equipment or function at the peak of your mental ability.

The effect that marijuana has on your ability to function is not the only side effect from the drug, however. Marijuana cigarettes contain hundreds of compounds that damage the lungs. Research has shown that regular and frequent use of marijuana, particularly in high doses, can cause problems with short-term memory and concentration.

As scientists learn more about glaucoma, they have also come to understand that IOP is not the only factor that damages the optic nerve. Recent studies characterize glaucoma as a neurologic disease similar to Parkinson's or Alzheimer's. And, there is increasing evidence that reduced flow of blood to the optic nerve may also cause damage in patients with glaucoma. Unfortunately, marijuana not only lowers IOP, but it lowers blood pressure throughout the body. As a result, it has the potential to lower the blood flow to the optic nerve, effectively canceling out the benefit of a lowered IOP. So, while marijuana can temporarily lower your IOP, it's not recommended for treating glaucoma. Prescription medications, laser and surgical treatments have been tested and proven as effective treatments for the glaucoma.

If you or someone you know has questions about eye exams, glaucoma and medical marijuana feel free to call Alabama Eye & Cataract Center in Birmingham at 205-930-0930, visit Alabama Eye & Cataract Center or facebook.com/michelsonlaservision.

Michelson Laser Vision and Alabama Eye & Cataract Center are leading eye care centers in Birmingham staffed by a team of specialists including eye doctors who are fellowship trained cornea specialists and cataract and lens implant specialists-all board certified Ophthalmologists & Corneal Specialists-as well as Optometrists, Opticians, technical and administrative staff who provide eye examinations for adults and children, cataract surgery and intraocular lens implants (IOL), laser eye surgery such as LASIK for laser vision correction, diagnosis and treatment of cornea disease including cornea transplants, care for diseases of the retina including diabetes and age related macular degeneration and diagnosis and treatment of glaucoma and fitting of eyeglasses and eyewear.