Out and About Costa Blanca Magazine - June 2021 Issue -188

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14 | OUT AND ABOUT COSTA BLANCA Different types of low vision devices also can help in different circumstances: • A student might need a camera-like telescopic device attached to a portable video camera magnifier to capture an image at the front of the classroom. That image then can be enlarged on a monitor on the student’s desktop. • A mechanic might benefit from a magnifier mounted on prescription eyeglasses, so that hands remain free to work. • A handheld magnifier is portable and easy to use when needs are simple. As an example, handheld magnifiers are ideal for checking product labels at the grocery store or quickly looking over the mail. “There is a lot of confusion about the size of devices and the power they have,” says Lylas G. Mogk, MD, founding director of the Visual Rehabilitation and Research Center of the Henry Ford Health System in Detroit. “Often people will say, ‘Well, this one is a 3x and that one is a 6x. So I want the one that’s a 6x.’ But the disadvantage of magnifiers with higher power is that you then see a much smaller area,” she says. “As a general rule, you want the magnifier with the least power you can get away with, in exchange for the largest area you are able to see.” If you are an avid reader, you will find that simple magnifiers are inadequate to help you sustain the concentration needed for an extended time period. Guide to magnifiers for low vision patients - Part II DR. M. ISABEL SIGNES-SOLER Which magnifiers work best in different circumstances? A small, handheld magnifier greatly enlarges a few words or sentences on a page. But reading something like a novel requires an expanded field of view and the ability to scan ahead in order to see and process information quickly. Another limitation of handheld magnifiers is that they can’t be used for task-specific activities such as knitting, which requires both hands to be free. In this case, you would need a magnifier on a stand that can be easily positioned where you need it. If you are buying a handheld magnifier or a magnifier on a stand, you might be interested in extra features such as: • Built-in lighting that can help you see better. • “Gooseneck” attachments in stand magnifiers that can be easily moved and adjusted to whatever position you need. • Various lenses and powers in the same device, so you achieve just the right magnification at the precise distance you need. Also, you may think high-powered reading glasses are the best solution for all your needs. But these types of low vision glasses limit you to seeing objects at a fixed distance that could be less than a foot from your nose. Dr. Mogk says the best reading tool for virtually anyone with vision loss is a video camera magnifier. These devices use video cameras that focus on items of your choice and then magnify them on a screen or monitor. Some features to look for in video camera magnifiers include:
DR. M. ISABEL SIGNES-SOLER JUNE 2021 | 15 • Autofocus • Color and black-and-white displays • Ergonomics allowing ease of use • Glare and contrast control • Compatibility with computers and computer screens • Screen size that best meets needs • Portability • Memory settings With video camera magnifier technology, people may benefit from glasses that focus at this intermediate distance. Bioptic telescopes require considerable concentration and quick reaction times This month discounts on frames and sunglasses up to 70% for driving, which means they aren’t for everyone. Each state specifies whether such devices can be used and — if so — what level of vision is required to be a candidate for this device. “Some of these high-end telescopes that are commonly prescribed may be ideal for students and young people. Dr. Jackson said telescopes clearly are an advantage for magnifying objects that are far away, in the same way that bird watchers and opera fans use binoculars. “But all telescopes decrease the area you see, and they all decrease the light,” says Dr. Jackson. “So if you have poor contrast sensitivity to begin with, you could have a lot of trouble looking through a telescope.” Television viewing is the most common use for telescopes, when people prefer not to move closer to the screen for a better view. Dra. Maria Isabel Signes-Soler, PhD, FAAO Tel: 965832080
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