Do retina transplants represent the future of retinal degeneration treatment?
July 1st 2008Transplants of foetal retinal cells are an effective treatment for retinal degeneration involving the destruction of photoreceptor cells, according to a report published in the August 2008 issue of the American Journal of Ophthalmology.
Substitute for live animal testing approved
July 1st 2008Live animal testing for ocular safety in the US is to be replaced with bovine corneal opacity and permeability (BCOP) and isolated chicken eye (ICE) assays, which do not involve the use of live animals. These alternative tests are scientifically valid and have acceptance as testing methods from regulatory agencies the Food and Drug Administration (FDA) and the Consumer Product Safety Commission (CPSC).
Study evaluates safety of intracameral moxifloxacin
June 30th 2008The safety of intracameral moxifloxacin (Vigamox, Alcon Laboratories) for post cataract surgery endophthalmitis prophylaxis was investigated in a prospective, randomized, controlled study. Statistical analyses of multiple postoperative outcome measures demonstrated no significant differences between patients who received intracameral moxifloxacin and controls treated with intracameral balanced salt solution.
Surgery may help improve vision when anti-VEGF therapy ineffective
June 25th 2008Surgical therapy for age-related macular degeneration in the form of macular translocation, injection of tissue plasminogen activator, and gas tamponade provides some improvements in visual acuity for patients whose conditions do not respond to the anti-vascular endothelial growth factor drugs.
Fundus autofluorescence imaging betters armamentarium
June 25th 2008Fundus autofluorescence imaging, one of the modes available in a new instrument (Spectralis HRA+OCT, Heidelberg Engineering), enhances its utility as a diagnostic device and a tool for monitoring therapy of patients with retinal and macular diseases.
NSAID activity at trough drug levels
June 23rd 2008Animals undergoing lens removal surgery were treated with non-steroidal anti-inflammatory drugs pre- and postoperatively. On the first day after surgery, aqueous humor samples were taken at times corresponding to trough drug levels. The mean aqueous prostaglandin E2 concentration was significantly lower in animals being treated with ketorolac 0.4% (Acular LS, Allergan) compared with those receiving bromfenac 0.09% (Xibrom, ISTA Pharmaceuticals).
Ophthalmologists debate whether ectasia is preventable
June 23rd 2008In a point-counterpoint debate at the annual meeting of the American Academy of Ophthalmology, one clinician contended that the rate of post-LASIK ectasia is declining and that, with careful screening and other preparatory steps, the rate of ectasia can be kept very low. The counter-argument by another clinician suggested that the multifactorial basis of ectasia as well as unknown risk factors make it impossible to prevent a certain percentage of cases from developing.
Aspheric IOL offers better contrast sensitivity
June 23rd 2008In a prospective, randomized, contralateral study of 75 adults, eyes in which an aspheric IOL (AcrySof IQ model SN60WF, Alcon Laboratories) had been implanted demonstrated better mesopic contrast sensitivity, significantly less spherical aberration, and significantly less total higher-order aberrations compared with eyes in which a standard spherical IOL (AcrySof model SA60AT, Alcon Laboratories) had been implanted. Cumulative uncorrected visual acuity and best-corrected visual acuity were equivalent between both groups.
Model predicts advanced AMD development
June 18th 2008A new model can predict the percentage of people who will develop advanced age-related macular degeneration (AMD) at various ages. The model, which is based on well-established risk factors for the disease such as age, smoking, and genetics, considers high-risk, intermediate-risk, and low-risk genotypes. Genotypes are more predictive of the risk of developing advanced AMD than is age.