June 23rd, 2007 by statuseyecare
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Fashionable sunglasses offer little or no protection from harmful rays emitted by the sun and people using sunglasses just for their brand name or style may even risk blindness, warn scientists in Britain.
The sun emits harmful ultraviolet rays and prolonged exposure to this radiation may severely affect the skin, eyes or the immune system.
But teenagers and young adults often choose sunglasses purely on the basis of their price and style without cross checking their safety standards.
A survey by the College of Optometrists in Britain showed that 63 percent of those questioned were more influenced by how sunglasses looked and how much they cost than by the protection they offered, said the online edition of Daily Mail.
This rose to 80 percent amongst respondents in the under-25 age group - with many keen to emulate the brands and styles of glasses worn by celebrities in glossy magazines. Worryingly, one in seven of the 1,500 surveyed did not wear sunglasses at all.
‘It is particularly worrying that younger people have so little regard for their eyes when up to 80 percent of exposure to UV rays over a person’s lifetime occurs before the age of 18,’ said Susan Blakeney, optometric adviser at the College of Optometrists.
Experts added that people with light-coloured eyes were more at risk from damage caused by ultraviolet rays if they failed to wear good-quality sunglasses.
Although all brands legally sold have to meet basic standards, there are plenty of fakes of expensive and fashionable brands in the market that do not comply, the scientists noted.
Wearing poor-quality sunglasses could damage the eyes and increase the risk of cataracts, which can lead to blindness later in life, they said.
The researchers suggested a simple quality test before buying sunglasses: hold them at arm’s length and tilt them slightly. Focus on an object in the distance, move them up and down and see if there is any distortion, especially at the lens edges. If the lenses are of high quality, there should be no movement.
Source: Here
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June 21st, 2007 by statuseyecare
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Each of these needs a different approach, and each has many pricey products that you can go out and buy in your local chemists or pharmacy which work well – but here are some simple and everyday solutions : For the lens : The most important thing is to be gentle with any chemicals/detergents or rubbing agents. If the glass is just dirty, and not covered in grease from when you adjusted your glasses with the hand that just managed the ingestion of your cheeseburger – then the classic slow but steady breath onto the lens followed swiftly by a gentle massage with a good quality linen or cotton cloth still works well. When you have transferred remnants of your lunch to the lens however, some chemical introduction coupled with temperature takes it to the next level. For normal glass or plastic lenses, a quick dunk in a pool of warm water with a couple of drops of washing detergent will usually do the trick to break through the grease. Of course if warm water isn’t available, a quick spray with a commercial/domestic window cleaner also does well. Be Careful however if you have an anti-reflection coating on your lenses – which is common on glasses that have been prescribed for night driving – as the surface of these lenses have been treated and washing up liquid or detergents will often smudge the lens even more and just make the situation worse. For this situation, you are better off with an optical spray and a nice clean cloth. The tip here is that it doesn’t have to be a glasses spray from the opticians – any optical spray (for cameras for example) will work just fine. For the nosepads : The surface of the nosepads are generally quite resistant to dirt and natural oils. They are usually made form a type of plastic or acetate –and so are not prone to reactions with the skin. Dirt can easily get lodged however between the nosepads and their mounts or the frame itself – so a warm soak for a couple of hours overnight will soften the residue – which can then be gently brushed away with an old soft bristle brush or toothbrush. For the frame : Many frame materials can form a greenish hue over time due to reactions with the skins natural acidity – and in the worst cases can actually corrode. The best resolution to this is to not let the glasses touch the face in the first place. If you can feel the frame touching the skin, then gently adjust the nosepads inwards to raise the glasses from the face. Once the green is on the frame, it is almost impossible to remove I’m afraid. Finally – the best way to keep your glasses or spectacles in tip top condition is to regularly rinse them in warm water, shake off most of the water and then dry gently. If you can stop dirt from building up in the first place, things don’t get to a crisis point !
source: here
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June 7th, 2007 by statuseyecare
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A revolutionary technique being developed by British scientists could cure blindness in millions of people around the world.
The first 45-minute operations could take place within five years and could be as common as cataract surgery in a decade.
The improvement is likely to be great enough to transform lives, allowing the blind to regain the ability to carry out everyday tasks such as reading or driving.
The pioneering stem cell surgery tackles age-related macular degeneration (AMD), the most common cause of blindness in the elderly.
AMD, which affects a quarter of over-60s around the world, and more than half of over-75s to some degree, occurs in two forms. While the ‘wet’ form can be combated with drugs, there is no treatment for the ‘dry’ form which accounts for 90 per cent of cases.
The treatment centres on human embryonic stem cells grown in a laboratory. These are ‘blank’ cells with the power to turn into different cell types and are used to create small patches identical to the cells damaged in the eyes of AMD sufferers.
Packaged into a syringe, the patch is injected into the back of the eye where it replaces damaged cells and restores sight.
The technique is being developed by scientists and doctors from University College London, Moorfields Eye Hospital, also in London, and Sheffield University, working together in the London Project to Cure Blindness.
“This could have a tremendous effect on a huge population who have no current therapy,” project director Professor Pete Coffey said.
The technique has been tested on rats suffering from a condition similar to AMD and their sight was restored.
Further evidence that the technique is likely to succeed comes from human operations. In these, the researchers restored vision using healthy cells taken from the corner of the patient’s own eye.
In some cases, the transplants were so successful that the patients were able to read, cycle and use a computer.
However, such surgery is extremely complex and time-consuming and so unlikely to be suitable for large-scale use. Using ‘readymade’ patches of cells would greatly simplify the operation, making it suitable for use on millions.
The scientists are now working on making such patches, measuring just four by six millimetres, which will be injected into the back of the eye under local anaesthetic in a procedure lasting between 45 minutes and an hour.
The patient, who would have to take drugs to stop the cells from being rejected by the body, could go home the same day. After two to three weeks, vision should start to improve.
It is not yet known how long the effects will last but the patients who had transplants of their own cells are still benefiting from the treatment which took place two and a half years ago.
While the patches are most likely to benefit those in the early stages of AMD, the researchers believe it should be possible to adapt them to treat those in later stages.
It is hoped that the technique might also benefit those who have lost their sight as a complication of diabetes.
Consultant surgeon Lyndon da Cruz of Moorfields Eye Hospital said that, within ten years, the procedure could become as commonplace as cataract surgery.
“If we can do a single procedure in a person under local anaesthetic in 45 minutes, it’s feasible. The science is something we can work on but the surgery has to be something we can deliver to many people,” he said.
Although many believe it is wrong to use embryonic stem cells – plucked from an embryo in the first days of life – in medicine, sophisticated laboratory techniques mean it should be possible to generate a treatment for millions of people from cells derived from a single embryo.
Stem cell research offers hope for treating and curing a host of conditions.
In recent work, British experts have succeeded in growing a ‘miniliver’ – a tiny bundle of liver cells – from stem cells, while Israeli scientists have grown a tiny section of beating heart tissue from stem cells gleaned from human embryos.
source: Mumbai Mirror
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