©2017-2020 Powered by HongDee Corporation

Designed by Victor Hao

Nov 27, 2018

Overview of Low Vision Devices

0 comments

By Bryan Gerritsen, M.A., CLVT Edited by Maureen A. Duffy, M.S., CVRT

 

 

What Are Low Vision Devices?

Low vision devices can help you make the most of your vision so that you can perform everyday tasks more easily and with less frustration.

Some devices, such as optical and non-optical aids, offer very simple and relatively inexpensive solutions. Other devices, such as electronic and digital magnifiers, may be slightly more complex and costly. However, both optical devices and electronic or digital devices require training to use them efficiently and effectively. Training is always one of the main keys to success with the use of low vision devices.

There are several different categories of low vision devices: optical devices, non-optical devices, and electronic magnifiers and magnifying systems. Low vision devices are task-specific, designed for close-up visual tasks or distance viewing. You may require several different devices to accomplish different tasks, depending upon your eye condition and your everyday living needs.

Low Vision Optical Devices

Low vision optical devices include a variety of helpful visual aids, including stand and hand-held magnifiers, strong magnifying reading glasses, loupes, and small telescopes. Because these devices can provide greatly increased magnification powers and prescription strengths, along with higher-quality optics (i.e., the way the lens bends or refracts light), they are different from regular glasses and magnifiers that you can buy in a local store or online. Most often they require training to help you use them effectively.

Low Vision Non-Optical Devices

Low vision non-optical devices can include adaptations such as reading stands, supplemental lighting, absorptive (or glare control) sunglasses, typoscopes, and tactile locator dots. They can be used in combination with low vision optical devices and can help with reading, organizing, labeling, and a variety of everyday tasks.

Electronic Magnifying Systems

Electronic magnifying systems come in many different varieties and sizes, depending upon the task or activity you want, or need, to do. Some have a camera system that displays a magnified image on a monitor, which can be helpful for reading mail, books, and magazines, while others are hand-held, portable, and can be taken to the supermarket to read labels and coupons, or to restaurants for reading menus.

How Can I Obtain a Low Vision Device?

They are often recommended as part of a low vision examination. A low vision exam by a low vision specialist — an ophthalmologist or optometrist with credentials or specialization in low vision testing, diagnosis, and treatment — is the best way to decide what type of device or devices are best for you, your eye condition, and your everyday living needs. At your low vision evaluation, you will have the opportunity to try a variety of devices in a variety of settings and learn first-hand how they can work for you.

How Can I Locate a Low Vision Specialist?

You can find a listing of low vision specialists in the "Low Vision Services" category in the AFB Directory of Services. In addition to the low vision providers in the Directory listings, you can find additional providers through the following directories:

Advice from Audrey Demmitt, RN, BSN, and a VisionAware Peer Advisor

Many people are apprehensive about low vision specialists and feel they are "just trying to sell me expensive devices that don't work." Sometimes, there is a very simple device available to do an everyday task, and sometimes the more expensive devices, such as video magnifiers, can truly be life-changing solutions that are worth considering.

I often hear my clients say, "Why can't the doctor just give me some new glasses that will work?" They often do not understand about uncorrectable vision problems and become frustrated.

Clients have even asked me, "Why do you have glasses that help you, but there are none that will help me?" I have retinitis pigmentosa and use prism magnifier reading glasses that enable me to read, but they don't work for every type of eye condition. Low vision devices are not "one size fits all."

I always try to advise people to start by having a low vision evaluation and learn the particulars of their eye condition before they try to purchase low vision devices on their own. Why purchase a variety of over-the-counter or mail-order devices that may or may not work? In the long run, going to a low vision specialist can save you money, time, and much frustration.

The benefits of having a low vision exam are many. You will discover new ways to do visual tasks, learn about new devices, receive expert and personalized advice, and have the opportunity to try them out before purchasing. Keep in mind that most devices require some training in order to use them effectively, and this is usually offered through the low vision clinic.

 

 

Advice from Audrey Demmitt, RN, BSN, and a VisionAware Peer Advisor

 

Many people are apprehensive about low vision specialists and feel they are "just trying to sell me expensive devices that don't work." Sometimes, there is a very simple device available to do an everyday task, and sometimes the more expensive devices, such as video magnifiers, can truly be life-changing solutions that are worth considering.

I often hear my clients say, "Why can't the doctor just give me some new glasses that will work?" They often do not understand about uncorrectable vision problems and become frustrated.

Clients have even asked me, "Why do you have glasses that help you, but there are none that will help me?" I have retinitis pigmentosa and use prism magnifier reading glasses that enable me to read, but they don't work for every type of eye condition. Low vision devices are not "one size fits all."

I always try to advise people to start by having a low vision evaluation and learn the particulars of their eye condition before they try to purchase low vision devices on their own. Why purchase a variety of over-the-counter or mail-order devices that may or may not work? In the long run, going to a low vision specialist can save you money, time, and much frustration.

The benefits of having a low vision exam are many. You will discover new ways to do visual tasks, learn about new devices, receive expert and personalized advice, and have the opportunity to try them out before purchasing. Keep in mind that most devices require some training in order to use them effectively, and this is usually offered through the low vision clinic.

 

this article is introduced from http://www.visionaware.org/info/everyday-living/helpful-products/overview-of-low-vision-devices/124

New Posts
  • 2018 Comprehensive Eye Care Section Ocular Photography Contest Now Open The Comprehensive Eye Care Section would like to announce that the 2018 Ocular Photography Contest is currently open and will close at 11:45 PM CST on August 1, 2018, with the winners being notified by September 1, 2018. Optometrists may submit up to two entries per category: •    Anterior Segment Category: Lids, Conjunctiva, Cornea, Contact Lens, Iris, Lens, Angle/Gonioscopy, Color photo, Anterior Seg OCT. •    Posterior Segment Category: Vitreous, Optic Nerve, Retina, Color/Red-free photo, Fluorescein Angiography/ICG, Fundus Auto-fluorescence, Posterior Seg OCT, HRT, GDx, B-scan ultrasound. The grand prize winner from each category will receive complimentary registration for Academy 2018 San Antonio and will have his or her photograph published in the OVS Journal, as well as in the meeting show daily, AAO Times. In addition to the two grand prize winners, the contest will award 4 honorable mentions. All of the winning submissions will be assembled into a photo tower which will be on display at the Academy meeting. Please complete the submission form to enter the contest. Please note the submission process has changed and submissions must be completed entirely at this website.  Please note: partial submissions cannot be saved and accessed at a later time; therefore, be prepared to complete your submission in its entirety. Emailed submission forms and photos will no longer be accepted. Late or incomplete submissions will not be considered. If you have any questions, please email contest co-chairs Dr. April M. Lewis and Dr. Melanie Gonzalez-Oliva at AcademyPhotographyContest@gmail.com . For full contest rules please visit the 2018 Ocular Photography Contest webpage. Also, you may view the previous contest winning submissions online. All the above information and articles are introduced from https://www.aaopt.org/detail/news/2018/06/15/2018-comprehensive-eye-care-section-ocular-photography-contest-now-open
  • Low vision is a term that refers to vision 20/70 or worse that cannot be fully corrected by glasses or contact lenses. People with low vision generally fall into two groups: partially sighted (meaning they have a visual acuity between 20/70 and 20/200 with the aid of corrective lenses), and legally blind (meaning vision is no better than 20/200 with regular correction aids).  What Causes Low Vision? Eye diseases are a common cause of low vision and many eye diseases have no early symptoms. Regular eye exams are important to check for early warning signs of serious eye and other health concerns. Between exams, it is important to let your eye care professional know if you notice any changes in your vision or if your eye is injured in any way. There are a wide variety of causes of low vision, including: Macular degeneration Diabetes/Diabetic retinopathy Glaucoma Cataracts Retinitis pigmentosa Inherited diseases Eye injury Symptoms of Low Vision A thorough eye examination is needed to diagnose causes of low vision. People with low vision may experience the following symptoms: Loss of central vision Night blindness Loss of peripheral vision Blurred vision Hazy vision Treatments for Low Vision Low vision cannot be fully corrected. However, there are a wide array of devices to help people with low vision, including tinted eyewear to help with light sensitivity and contrast, magnifiers (hand held and for digital or computer use), and large-print reading materials or audio recordings. There are certain eye care professionals who specialize in rehabilitation for low vision, who can help you continue many of your normal activities with some modifications. Ask your eye care professional if this may help you. NPR.0413.USA.17 All the above information and articles are introduced from http://www.bausch.com/your-eye-concerns/diseases-and-disorders/low-vision
  • Your Sight Depends on Seeing the Right Eye Care Provider at the Right Time When it's time to "get your eyes checked," make sure you are seeing the right eye care professional for your needs. Ophthalmologists, optometrists and opticians each play an important role in providing eye care to consumers. But the levels of training and expertise are quite different for each type of provider. Here's a quick look at the types of eye care providers: An ophthalmologist is a medical or osteopathic doctor who specializes in eye and vision care. Ophthalmologists differ from optometrists and opticians in their levels of training and in what they can diagnose and treat. As a medical doctor who has completed college and at least eight years of additional medical training, an ophthalmologist is licensed to practice medicine and surgery. An ophthalmologist diagnoses and treats all eye diseases , performs eye surgery and prescribes and fits eyeglasses and contact lenses to correct vision problems. Many ophthalmologists are also involved in scientific research on the causes and cures for eye diseases and vision disorders. Subspecialists: additional knowledge and training for specific eye needs While ophthalmologists are trained to care for all eye problems and conditions, some ophthalmologists specialize in a specific area of medical or surgical eye care. This person is called a subspecialist . He or she usually completes one or two years of additional, more in-depth training called a fellowship in one of the main subspecialty areas such as glaucoma, retina, cornea, pediatrics, neurology and plastic surgery, as well as others. This added training and knowledge prepares an ophthalmologist to take care of more complex or specific conditions in certain areas of the eye or in certain groups of patients. Optometrist � � Optometrists are healthcare professionals who provide primary vision care ranging from sight testing and correction to the diagnosis, treatment, and management of vision changes. An optometrist is not a medical doctor. An optometrist receives a doctor of optometry (OD) degree after completing four years of optometry school, preceded by three years or more years of college. They are licensed to practice optometry, which primarily involves performing eye exams and vision tests, prescribing and dispensing corrective lenses, detecting certain eye abnormalities, and prescribing medications for certain eye diseases. this article is adapted from https://www.aao.org/eye-health/tips-prevention/what-is-ophthalmologist