Tuesday, May 28, 2013

Boston Glaucoma Specialist on Medical Marijuana

Medical marijuana is promoted as a treatment for many diseases, including glaucoma. Boston Glaucoma Specialist Bin Wu, M.D. discussed medical marijuana and glaucoma. “Glaucoma is an eye disease in which the optic nerve becomes damaged over time, reducing peripheral vision. If not properly diagnosed and treated it can lead to blindness. One cause of the optic nerve damage in glaucoma is higher-than-normal pressure within the eye, called intraocular pressure or IOP,” explained Dr. Wu of D’Ambrosio Eye Care with offices in Athol, Lancaster, Acton & Gardner, Massachusetts. Currently glaucoma treatment for the most part is to lower IOP levels with eye drops, laser treatment, oral medications and sometimes surgery depending on the type of glaucoma and how severe it is.”

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 they are encouraged to schedule an eye examination at D’Ambrosio Eye Care by calling us at 800-325-3937, visiting D’Ambrosio Eye Care or facebook.com/dambrosioeyecare so that we can help recommend an appropriate treatment plan.

Staffed by a team of Ophthalmologists, Optometrists, Opticians, technical and administrative staff who provide eye examinations for adults and children, cataract surgery and intraocular lens implants (IOL), laser vision correction such as LASIK, 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 as well as contact lenses, eyeglasses, eyewear  and optical services.

D'Ambrosio Eye Care is a leading eye and LASIK care practice in Athol, Lancaster, Gardner and Acton that serves the greater Boston and central Massachusetts area including Acton, Athol, Berlin, Bolton, Boylston, Boxborough, Chelmsford, Clinton, Concord, Fitchburg, Gardner, Greenfield, Groton, Harvard, Hudson, Lancaster, Leominster, Lexington, Littleton, Lowell, Lunenburg, Marlborough, Milford, Shelburne Falls, Shirley, Sterling, Stow, Sudbury, Templeton, Westminster, Westborough, Winchendon and Worcester, Massachusetts.

Monday, May 13, 2013

Boston Surgeon on Cataract Surgery & Vitreous Detachment

Boston Cataract Surgeon Francis D’Ambrosio, Jr., M.D. explained why cataract surgery patients often experience Posterior Vitreous Detachment (PVD) after a cataract operation. “Posterior Vitreous Detachment (PVD) does indeed appear to be more common in individuals who have had cataract surgery. There may not be an obvious "cause and effect" relationship but there are a number of possible factors that contribute to this,” said Dr. D’Ambrosio, Jr. of D’Ambrosio Eye Care with offices in Athol, Lancaster, Acton & Gardner, Massachusetts
  • The vitreous changes that lead to vitreous liquefication and instability and ultimately PVD are age-related, as are cataracts and the need for cataract surgery. 
  • Removal of a cataract can allow mechanical space shifts in the vitreous gel and perhaps increase the odds of PVD. 
  • Biochemical changes actually occur following cataract surgery and these appear to increase the likelihood of PVD, particularly if the posterior lens capsule is opened. 
  • Unusual complications of cataract surgery can disrupt the integrity of the vitreous gel and increase the odds of PVD. 
“What we know clinically as a practical matter is that it is pretty typical for some 50% or more of patients undergoing cataract surgery will experience a Posterior Vitreous Detachment (PVD), with some patients noticing visual symptoms including a “cobweb” or some floaters,” explained Dr. D’Ambrosio, Jr. “If the visual symptoms become excessive or are accompanied by a curtain or veil in your vision, or perhaps distortion of your vision, we want to hear from you immediately.” 

If you or someone you know has a question or concerns about cataracts, cataract surgery or Posterior Vitreous detachment (PVD) please feel free to schedule an eye examination at D’Ambrosio Eye Care by calling us at 800-325-3937, visiting D’Ambrosio Eye Care or facebook.com/dambrosioeyecare so that we can help recommend an appropriate treatment plan. 

Staffed by a team of Ophthalmologists, Optometrists, Opticians, technical and administrative staff who provide eye examinations for adults and children, cataract surgery and intraocular lens implants (IOL), laser vision correction such as LASIK, diagnosis and treatment of cornea disease including cornea transplants, care for diseases of the retina including diabetes and age related macular degeneration (AMD) and diagnosis and treatment of glaucoma as well as contact lenses, eyeglasses, eyewear and optical services. 

D'Ambrosio Eye Care is a leading eye and LASIK care practice in Athol, Lancaster, Gardner and Acton that serves the greater Boston and central Massachusetts area including Acton, Athol, Berlin, Bolton, Boylston, Boxborough, Chelmsford, Clinton, Concord, Fitchburg, Gardner, Greenfield, Groton, Harvard, Hudson, Lancaster, Leominster, Lexington, Littleton, Lowell, Lunenburg, Marlborough, Milford, Shelburne Falls, Shirley, Sterling, Stow, Sudbury, Templeton, Westminster, Westborough, Winchendon and Worcester, Massachusetts.

Monday, May 6, 2013

LASIK Surgery with Glaucoma in Massachusetts

“We would consider performing LASIK for certain patients with glaucoma-but it is really quite an individual determination. It depends a great deal on the stability of the glaucoma and whether and how much damage to the optic nerve the disease has caused,” remarked Massachusetts LASIK Surgeon Francis D’Ambrosio, Jr., M.D. of D’Ambrosio Eye Care with offices in Athol, Lancaster, Acton & Gardner. “During the LASIK procedure we use a suction ring or device for a short time and this can cause a temporary elevation of intraocular pressure or IOP-something we are cautious about in patients with glaucoma,” Dr. D’Ambrosio further explained. 

Generally, unless the glaucoma is severe it is possible that LASIK could be an option for most patients. Other types of laser eye surgery for vision correction such as PRK might be preferred. In some cases it might actually be beneficial to have lens replacement surgery using advanced technology lens implants for vision correction. 

If you or someone you know has glaucoma or is a glaucoma suspect and is considering LASIK, we would be happy to provide a free consultation to help determine if they are a LASIK candidate or perhaps a better candidate for another type of refractive surgery. Please feel free to please contact us to schedule a Free Consultation at D’Ambrosio Eye Care by calling us at 800-325-3937, visiting D’Ambrosio Eye Care or facebook.com/dambrosioeyecare so that we can help determine whether you are a good candidate. 

Staffed by a team of Ophthalmologists, Optometrists, Opticians, technical and administrative staff who provide eye examinations for adults and children, cataract surgery and intraocular lens implants (IOL), laser vision correction such as LASIK, 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 as well as contact lenses, eyeglasses, eyewear and optical services. 

D'Ambrosio Eye Care is a leading eye and LASIK care practice in Athol, Lancaster, Gardner and Acton that serves the greater Boston and central Massachusetts area including Acton, Athol, Berlin, Bolton, Boylston, Boxborough, Chelmsford, Clinton, Concord, Fitchburg, Gardner, Greenfield, Groton, Harvard, Hudson, Lancaster, Leominster, Lexington, Littleton, Lowell, Lunenburg, Marlborough, Milford, Shelburne Falls, Shirley, Sterling, Stow, Sudbury, Templeton, Westminster, Westborough, Winchendon and Worcester, Massachusetts.