CTR enhances stability, centration of capsular bag
September 15th 2004Cataract surgeons in the United States now have at their disposal an exceptionally useful and beneficial device, the capsular tension ring (CTR), available from two different sources (Morcher Capsular Tension Ring, FCI Ophthalmics; StabilEyes, Advanced Medical Optics Inc.). A simple ring of polymethylmethacrylate (PMMA) with an eyelet at either end, the ring may be inserted into the capsular bag to enhance stability and centration. I have had the opportunity to employ this device and would like to share my current view of its proper use, benefits, and risks.
CTR enhances stability, centration of capsular bag
September 15th 2004Cataract surgeons in the United States now have at their disposal an exceptionally useful and beneficial device, the capsular tension ring (CTR), available from two different sources (Morcher Capsular Tension Ring, FCI Ophthalmics; StabilEyes, Advanced Medical Optics Inc.). A simple ring of polymethylmethacrylate (PMMA) with an eyelet at either end, the ring may be inserted into the capsular bag to enhance stability and centration. I have had the opportunity to employ this device and would like to share my current view of its proper use, benefits, and risks.
Principles leading to contact lenses date to 15th century
September 15th 2004Contact lens use, as we know it today, began in the late 1940s with the introduction of the corneal contact lens, although sclero-corneal contact lenses were first used in the late 1880s. Even though use of contact lenses is approximately 120 years old, the basic concepts and the physiological optical principles leading to the clinical development of the contact lens date back to the 15th century.
Note differences between optic nerve diseases
September 15th 2004Los Angeles-Chronic progressive optic neuritis or optic nerve sheath meningioma? Until fairly recently, differentiating these two clinical entities would not have affected the clinical outcome because of the lack of an established safe, efficacious treatment for either condition. However, things have changed, said Howard R. Krauss, MD.
Dr. Cioffi brings wealth of information to post
September 15th 2004George A. (Jack) Cioffi, MD, is board-certified in ophthalmology. He earned his medical degree from the University of South Carolina and completed his residency in ophthalmology at the University of Maryland and fellowship inresearch and clinical glaucomaat Devers Eye Institute.
Allergan enters patent battle over generic version of brimonidine tartrate solution
September 15th 2004Irvine, CA-Allergan Inc. said it has filed a lawsuit against Alcon Laboratories Inc. claiming that the Fort Worth, TX company infringed upon Allergan's patents for brimonidine tartrate ophthalmic solution 0.15% to manufacture a generic alternative to its Alphagan P drops.
FDA advisory group likes Macugen but delays formal vote for now
September 15th 2004New York-Members of the FDA's advisory committee reviewing pegaptanib sodium injection (Macugen) for the treatment of neovascular age-related macular degeneration say they are "impressed" with the drug but declined to take a formal vote.
Telescope may serve as permanent prosthesis for bilateral AMD
September 15th 2004San Diego-An implantable miniature telescope in the capsular bag provides a permanent visual prosthetic device for patients who are legally blind from bilateral age-related macular degeneration (AMD). While there is a learning curve, an early assessment of the implantation indicates that anterior segment surgeons are familiar with the standard phacoemulsification and manual extracapsular surgical skills used for this procedure, according to David F. Chang, MD.
Multifocal ablations are option for correcting presbyopia
September 15th 2004Multifocal ablations have been gaining ground for the correction of presbyopia in the past year. Here at the University of Ottawa we have been studying this approach with the VISX STAR S4 excimer laser, with promising results as many patients are able to achieve excellent near and distance acuity.
RLE for high myopia considered safe, effective in short term
September 15th 2004San Diego-With the availability of foldable IOLs able to correct up to -31 D of spherical error, refractive lens exchange (RLE) for high myopia is now an option for patients hoping to achieve a good refractive outcome. However, patients will need to be monitored long term for potential complications, such as retinal detachments and posterior capsular opacification (PCO), explained Thomas Kohnen, MD, who spoke during the American Society of Cataract and Refractive Surgery annual meeting.
CK effective in low-level hyperopia, hyperopic astigmatism
September 15th 2004San Diego-Conductive keratoplasty (CK) is proving to be a versatile procedure that also can be used as an off-label procedure to enhance the vision of patients who have undergone cataract extraction. The visual results were excellent and patients expressed satisfaction. CK may be a more attractive procedure for this patient group because of safety and economic considerations, according to Louis D. "Skip" Nichamin, MD.
Wavefront measurement methods discussed
September 15th 2004The only constant in the relatively young life of refractive surgery has been change. Even now as our patients reap the rewards of decades of research in the form of customized wavefront ablation, currently unforeseen improvements are inevitable.
Device-independent tool interprets corneal topography
September 15th 2004San Diego-There is a great variety of instruments and displays commercially available to assess corneal topography. The array of instrumentation makes it increasingly difficult to interpret corneal topography maps correctly. During the Innovator's Session of the recent annual meeting of the American Society of Cataract and Refractive Surgery, Stephen D. Klyce, PhD, introduced a device-independent neural network-based tool that automatically interprets corneal topography maps.
Sudden unilateral anterior uveitis is key to diagnosing spondyloarthropathies
September 15th 2004Portland, OR-Seronegative spondyloarthropathies are the most likely group of diseases that ophthalmologists will encounter in their practices, yet many cases will be overlooked if doctors rely on classic textbook definitions of symptoms, according to James T. Rosenbaum, MD, professor of ophthalmology and medicine, Casey Eye Institute, Oregon Health and Science University, Portland.
Verteporfin developer honored for research
September 15th 2004Vancouver, British Columbia-A research chemist from QLT Inc. who helped develop the verteporfin for injection (Visudyne, QLT/Novartis Ophthalmics) treatment for age-related macular degeneration is among 13 chemists from four companies who have been named Heroes of Chemistry by the American Chemical Society.