IOL technology mimics 53-year-old crystalline lens
October 15th 2002Jackson, MI-The new AcrySof Natural IOL (Model SB30AL, Alcon, Fort Worth, TX), which has a light transmission spectrum similar to that of a 53-year-old human crystalline lens, is the first of its kind that has become commercially available. It effectively filters blue light between 400 and 500 nm and preserves contrast sensitivity and color perception, according to Paul Ernest, MD.
LASIK useful for treating hyperopia induced by RK
October 15th 2002Jundiai, Brazil-Residual refractive errors induced by RK can be treated successfully by hyperopic LASIK. This is of particular importance for patients who underwent RK because the procedure has proved to beunstable over the long term, with 25% to 43% progressing to hyperopia.
Ray tracing analyzer helps map highly aberrant corneas
October 15th 2002Toronto-Patients with highly aberrant corneas can benefit from the Tracey Visual Function Analyzer (Tracey Technologies, LLC, Houston) using refractive surgery complications software, because the system can accurately create a wavefront map and treatment ablation profile.
Ultra-thin flaps created with femtosecond laser keratome
October 15th 2002Tijuana, Mexico-The Pulsion PS femtosecond laser keratome (IntraLase, Irvine, CA) provides uniform flap thickness that is reproducible and accurate between 100 and 180 ?m, according to Arturo Chayet, MD, who recounted his experience with the device.
Anterior chamber lens holds promise for high hyperopia
October 15th 2002Stanford, CA-The Artisan hyperopia lens (Ophtec BV, Groningen, The Netherlands) appears to provide good visual results for extreme hyperopia ranging from 3 to 12 D, according to phase III results reported by Edward E. Manche, MD, assistant professor of ophthalmology and director of cornea and refractive surgery, Stanford University School of Medicine, Stanford, CA.
Donation will help fight blindness in Africa
October 15th 2002Atlanta-CIBA Vision has donated $30,000 to the International Center for Eyecare Education (ICEE) to provide eye-care services for people in Africa. The donation was made following a series of lectures by ICEE Chairman Brien A. Holden, PhD, throughout the United States.
Head-to-head trial: Phase III study tests options for wet AMD
October 15th 2002Fort Worth, TX-Alcon Research Ltd. is enrolling about 500 patients in a phase III study to compare the effects of anecortave acetate versus verteporfin (Visudyne, Novartis) photodynamic therapy for the treatment of wet age-related macular degeneration.
Ophthalmic innovations abound at AAO exhibits in Orlando
October 1st 2002All eyes are focused on Orlando for this year's meeting of the American Academy of Ophthalmology (AAO), Oct. 20 to 23. More than 500 exhibitors will showcase the latest ophthalmic technology in Halls A and B (Level 2) of the Orange County Convention Center.
Sleep apnea may be a possible glaucoma risk factor
October 1st 2002Augusta, GA-Findings from a variety of studies point to a link between sleep apnea and glaucoma, but carefully designed clinical trials are warranted, said Parag A. Gokhale, MD, assistant professor of ophthalmology, Medical College of Georgia, Augusta.
Price cutting is detrimental in managed-care contracts
October 1st 2002Price wars are a no-win game for physicians contracting "for market share" with HMOs, IPAs, PPOs, and other managed-care organizations. That is because price is the easiest form of competition to beat. There is always someone around willing to treat the patients for a little bit less.
Dual-optic IOL design may be answer for near vision
October 1st 2002San Francisco-A new type of accommodating IOL has been designed to fill the capsular bag and respond to ciliary body contraction and zonular relaxation, providing near vision. It also has been shown to be implantable through clear corneal wounds in cadaver eyes.
Transplantation of RPE cell line allows vision preservation
October 1st 2002Salt Lake City-Researchers working with an animal model of retinal degenerative disease have demonstrated that a human-derived, extended-life retinal pigment epithelial (RPE) cell line can be successfully transplanted and that such treatment results in durable vision preservation.
Laser ablation responsible for high increase in aberrations
October 1st 2002Rochester, NY-Higher-order aberrations increase slightly after cutting a corneal flap with a microkeratome, there is minimal systematic change in the various modes of aberration with the exception of trefoil, and a slight hyperopic shift also occurs. However, after laser ablation there is a 40% to 60% increase in positive spherical aberration, according to Scott MacRae, MD.
Surgical technique influences refractive outcomes, stability
October 1st 2002Mesa, AZ-A study of the refractive performance of two IOL styles, namely, a three-piece acrylic IOL (MA60BM, Alcon, Fort Worth, TX) with polymethylmethacrylate haptics and a new single-piece acrylic IOL (SA60AT, Alcon), showed that both IOLs provided patients with excellent refractive outcomes when the capsulorhexis was constructed in such a way as to be round, centered, and smaller than the optic of the IOL. Implantation of the SA60AT resulted inexceptionally high refractive accuracy, according to Warren E. Hill, MD, a private practitioner in Mesa, AZ.
Intracranial tumors show neuro-ophthalmic manifestations
October 1st 2002The ophthalmologist may be the first medical encounter for a patient with an intracranial tumor. Localization of the lesion is critical, and "where the lesion is" at the diagnosis stage is more important sometimes than "what the lesion is."
Innovative procedure relieves AION, improves vision
October 1st 2002Margate, FL-Two Florida ophthalmologists have successfully tested a new procedure called retinal endovascular surgery (REVS) to treat anterior ischemic optic neuropathy (AION) in which there is poor blood circulation to the optic nerve, by injecting tissue plasminogen activator (t-PA) into the retinal vasculature.