PV News – Precision Vision® Newsletter – July 2010 – Low Vision Products
Precision Vision is committed to helping those with Low Vision. Did you know – that over 20 million Americans have early or intermediate AMD and that one in five will lose some vision? Precision Vision is committed to serving these individuals by providing Eye Care Professionals with top quality products that exceed expectations from manufacturers such as Schweizer, S. Walters, and the recently added MultiLens portfolio of products.
- MultiLens Low Vision Products
- ML VIDI – Wide Field Telescope
- ML FILTERS – Colors for comfort, contrast, and protection
- ML BINO – For close reading binocularly
- Upcoming Tradeshows
As discussed in our March 2010 newsletter many Low Vision patients are told by their primary eye care provider that “nothing can be done” for them and these words are incredibly damaging as many patients suffer from depression as a result of this news and give up hope that there may be a solution that works for them as they assume they will go blind. Many of these individuals lose their sense of independence as they are forced to rely on friends and family to help them with many personal and private daily tasks such as reading their mail and reconciling bank statements. While they may lose some sight in the central area of their vision; the proper training, lighting, and magnification can return some of their independence and this is what makes Low Vision aids and solutions so important. As an Eye Care Professional are you and your staff prepared to offer your Low Vision patients customized solutions to fit their unique set of circumstances?
The MulitLens portfolio of products is designed to allow Eye Care Professionals (ECP) flexibility in design while utilizing advanced optics and creative applications. MultiLens enables the ECP to provide a custom-made optical solution for their patient, many times on the same visit, right from their exam room or dispensary.
MultiLens is known for thinking outside of the box when designing their unique Low Vision solutions and the ML VIDI is no exception. Addressing the problems created by high magnification, such as the narrowing of the visual field, the ML VIDI telescopic system uses slightly less than 2x magnification and combines this magnification with a very wide visual field, making it is possible to get closer to an object and still see the whole object. Since the distance to the object is shorter, this in itself magnifies the object and the real magnification on the retina becomes higher thus accomplishing high magnification without the side effects of a narrow field of view. This short distance also decreases the need to have the telescopic system in a fixed position to attain a steady image which makes the ML VIDI one of the most powerful telescopic devices on the market.
The ML VIDI is also one of the most versatile Low Vision Telescopic systems as it allows the option of individual Rx corrections, frame options, and other adjustments. This unique system employs a special mounting lens that can be edged to virtually any frame the patient may desire. The ECP can edge this mounting lens in house on their edger or by simply sending it in to their local Optical Lab to be edged with their regular Rx work.
The ML VIDI is available to the ECP in an easy to use Test Set which contains two of the ML VIDI basic systems, front lenses for different working distances and an instruction manual. All of which can be combined in the exam room or dispensary to create a custom Low Vision solution while the patient waits, eliminating the need for the patient to schedule a follow up visit allowing the ECP more time to assist additional patients.
Multilens has been manufacturing medical-filters which block a specific spectra of light since 1987. They are mainly used to give better comfort, sharpness and contrast, but are also a protection against short-wave light.
When the light passes through the lens of the eye, the blue part of the spectra will spread, causing what could be described as distortion on the retina. The purpose of a filter lens is to block this disturbing part of blue light. This is one of the main reasons why so many people who have tried filter-lenses experience increased comfort, sharpness and contrast. This is especially true for individuals with Low Vision who are more dependent on the information they get from the retina, making it imperative that it is as clear and sharp as possible.
Most of the clinical studies today show that the short-wave UV- and bluelight has a damaging effect if it is allowed to pass through the cornea and on to the retina. How damaging it is will depend on the energy of the light, which depends on the light’s wavelength. The shorter the wavelength, the higher the energy is.
An optical device and a filter often go hand in hand. The purpose of the optical device is to give the patient the needed magnification and a sharp image. But, the importance of good illumination and a filter that blocks disturbing light, should never be underestimated.
ML Filters are available in stock for use in the ML VIDI system, as a plano-lens which an ECP can edge into a patient’s preferred frame, and as “flirps”, pictured right, which are used by ECPs to assess the proper filter color for their patients unique needs.
The ML Bino helps patients to read using their binocular vision at a short reading distance. When a magnified image is placed on the retina, and as the reading addition is increased, the reading distance is reduced and thus the patient has to converge more. The reading distance may become so short that the normal ability to converge is insufficient and as a result a double image will be seen.
This can be resolved by using “base-in” prism to assist the patient’s natural convergence. There are a number of factors that must be taken into account when deciding whether or not to use these devices, and these are described below. We will also try to indicate why an ML BINO, + 8 for instance, will function in different ways for different patients.
The prism is very precisely measured, placed and edged into the frame. This is essential to avoid unwanted prism vertically which causes problems and discomfort for the patient.
The position of the eye in relation to the optical center (CD) of the lens will influence the amount of prism which the lens can create. An eye which looks through an optical plus lens, with the optical center nasal to the eye, will create base-in prism. Consequently, a patient with a large PD will have more prism base-in than a patient with a small PD. However, a patient with a large PD will have to converge more in order to be able to read at the same distance as a patient with a small PD.
The reading distance has a clear influence on the function of the device because it is that distance which will affect how much prism is required. The reading distance will be dependent on the power of the device and the patient’s refractive error.
Visit Precision Vision at the following tradeshow. If you are attending an upcoming tradeshow and want to avoid unnecessary shipping costs and delays, we’d be happy to bring small portable products to the meeting. Place your order online or call us at 800-772-9211. Just be sure to tell us which tradeshow to hold the products for.
|ESCRS||Paris, France||4-10 September|