Optical Illusions

As a child I have always loved optical illusions. I still am fascinated by the effects they produce. Here is oneNew Scientist reported that the cause of the above optical illusion, where the spirals appear to flow, has finally been solved.This illusion was made famous by a 1981 painting, Isia Leviant's EnigmaResearchers from the Barrow Neurological Institute in Arizona have demonstrated that the way our eyes constantly make tiny movements, called microsaccades, is responsible for the way concentric circles in the painting seem to flow before onlookers' eyes. For the experiment, the investigators had three participants view the painting while cameras recorded their eye movements 500 times every second. Next, the participants were asked to press...

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Hurler regains sight after 'miracle' diet supplement

The Irish Independent reported that age-related macular degeneration (AMD) is a condition affecting the central part of the retina at the back of the eye. AMD affects one in 10 people over the age of 50, and is the leading cause of blindness in the Western world. Dara Kilmartin, consultant ophthalmic surgeon at the Eye and Ear Hospital in Dublin, Ireland, explained that, by 2020, the number of people with AMD is going to at least double, because people are living longer. Dr. Kilmartin said that the risk of AMD becomes greatest over the age of 65. One in five people over 75 will have AMD. Dr. Kilmartin pointed out that risk factors include age, family history, and smoking. In addition, there is a possible link between AMD and obesity, high blood...

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IOl blocks UV Rays

Intraocular lenses, or IOLs, are the artificial lenses that replace the eye's natural lens that is removed during cataract surgery. IOLs have been around since the 60s, though the FDA gave its approval for one occurred in 1981. Before that, if you had cataracts removed, you had to wear very thick eyeglasses or special contact lenses in order to see afterward, since the natural lens that had been removed wasn't replaced with anything. Traditional IOLs are monofocal, meaning they offer clear vision at distance only, making the need for reading lenses an absolute necessity. New 'multifocal and/or accommodating' IOLs offer the possibility of seeing well at more than one distance, without glasses or contacts.WHAM-TV Rochester, an ABC affiliate, reported that patients undergoing cataract surgery...

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Complementary, alternative medicine becoming more mainstream

I was recently @ the local chapter of Optometrist meeting where the topic of discussion was Complimentary Medicine as applied to Dry Eye and Hormonal Balance. I was very intrigued by what I heard. On the front page of its Health section, the Washington Post reports that the Johns Hopkins Integrative Medicine and Digestive Center...is the latest indication that alternative medicine is making its mark in mainstream healthcare settings.This link with Hopkins is part of a trend toward integrating CAM [complementary and alternative medicine] with conventional medicine. A recent survey of 1,400 hospitals found that 27 percent offered some sort of alternative or complementary treatment, which represents a significant increase from eight percent in 1998. Last year, Hopkins -- a bastion of mainstream...

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Boy with low vision plays offensive tackle on youth football team!

California's San Mateo Daily News reported that 10-year-old Tino Benelli, a student who plays offensive tackle as well as defense for the local Pop Warner team, Bayside Broncos, has albinism, a condition that renders him legally blind. Currently, the boy plays football with low to no vision, because referees do not allow him to wear a doctor-prescribed, tinted face shield, for safety reasons. But, starting next week, he will wear tinted goggles instead. Until then, Tino will play without any light-filtering protection. The Daily News explained that albinism refers to a group of inherited conditions in which people have little or no pigment in their eyes, skin, or hair. They have altered genes that do not make the usual amounts of a pigment called melanin. One in every 17,000 residents in...

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Radiation for Macular Degeneration

One can tel how much time/money and effort is being placed on the problem that's facing the older generation by looking at media exposure and technological advances. Here is another report shown on KGO-TV San Francisco, an ABC affiliate, yesterday.Macular Degenaration is the most common form of vision loss among people over 60. In a clinical trial taking place in San Jose, Calif., "a combination therapy" is "being tested by Amr Dessouki, M.D. For the trial, Dr. Dessouki will first inject patients' eyes with Lucentis (ranibizumab), a drug approved to treat wet age-related macular degeneration, that is proven to block abnormal blood vessel growth and prevent bleeding. Next, Dr. Dessouki will saturate the cluster of blood vessels with a targeted dose of radiation delivered by "a laser device...

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Implantable capsule may help treat dry macular degeneration

Last week, the U.S. Food and Drug Administration fast-tracked a novel treatment for two eye diseases: age-related macular degeneration (AMD) and retinitis pigmentosa (RP). The new treatment, developed by the Lincoln, RI, biotech company Neurotech, is a capsule that's surgically implanted in the eye. Inside are genetically engineered cells that produce a protein that may prevent light-sensitive cells in the retina from dying, thus protecting vision. The device is currently in phase II clinical trials. Retinal cells translate light into electrical signals, which are relayed to the brain. But, in both retinitis pigmentosa and in the dry form of age-related macular degeneration, light-sensitive cells in the retina degenerate over time, resulting...

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Intra Ocular lens

Ohio's Newark Advocate reported that, during cataract surgery, doctors remove the natural lens of the eye and replace it with a new one. Now, a series of premium lenses allows...more freedom for cataract patients than traditional monofocal lenses. Two multifocal lenses -- ReZoom and ReStor -- have concentric circles with different focusing zones. By comparison, the Crystalens is a homogenous lens that has special arms that allow eye muscles to focus naturally by moving the lens back and forth within the eye.The Advocate pointed out that each lens has its advantages and drawbacks. For example, rings in the ReStor and ReZoom lenses can cause some patients to experience a halo effect or glare, which should diminish with time. The single lens...

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Eye drops no more

A tiny coil, which is implanted in the eye, could mean an end to the injections and drops used by thousands of patients with common eye complaints.The spiral-shaped" device, which is inserted through a hollow needle, can be loaded with drugs to treat conditions, such as glaucoma and diabetic macular edema. Called the I-vation, the device is similar to a Slinky toy, and made from a metal alloy. The implant is injected into the eye...in a minimally invasive procedure that takes just 15 minutes.Medications are mixed into a material which coats the device. Then, as the coating slowly dissolves, they are released over a period of up to two years, medicating the eye continuously.Here is a comparison of the device with a quarter:The device's "coiled...

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High Tech for Low Vision

More than 16 million Americans report some form of visual impairment, even when wearing glasses or contacts. That number is expected to double by 2030 as the aging population brings rising rates of macular degeneration, glaucoma, diabetic retinopathy, and other eye diseases.For people who suffer from "'low vision' (technically, worse than 20/60 in the better eye), an ever-growing array of devices can help them maximize their remaining vision and, in many cases, compensate for what they've lost. Still, people who are visually impaired should have a comprehensive vision rehab assessment. This includes a visit with an eye doctor, a technology specialist, and an occupational therapist who can evaluate a person's limitations and goals. While Medicare and private insurance will pay for a doctor's...

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