Aug. 06, 2024
Find out if you Have Binocular Vision Dysfunction AND GET THE CARE YOU NEED TODAY
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With advances in technology, people who need corrective lenses have more options than before. New developments in eye care, such as microprism lenses, have been shown to aid in a variety of vision problems. They have their most significant utility in the treatment of heterophorias associated with
binocular vision dysfunction (BVD)
.
Prism glasses
consist of a frame and lenses that contain prism. They are most commonly used to treat small vision misalignments (like
vertical heterophoria
) and large misalignments that cause double vision.
Prism lenses are a specialized and unique eyeglass lens used to help individuals with more complex vision impairments. Prisms can be incorporated directly into traditional eyeglass prescriptions. Prism lenses alter your neuro-visual perception by changing the direction in which light (and the image that it contains) is reflected into your eye. Prism &#;moves&#; the image, allowing your brain to &#;think&#; that an object is exactly &#;where it needs to be&#; to be in alignment. If the brain believes everything is in alignment, there are no attempts made to realign the images, no eye muscle strain and overuse, and no additional negative symptoms.
The most common reason your eye doctor might prescribe prism glasses is to
correct image misalignments
caused by conditions like vertical heterophoria or larger misalignments that cause double vision. Prism by itself does not correct nearsightedness or farsightedness. Therefore, most prism glasses containing prism are constructed in a way in which the prism is &#;ground into&#; the lenses, making for a superior product with better optics. These lenses that the prism is ground into also contain the optical prescription for correcting the astigmatism unique to the individual &#; solving multiple vision concerns with one pair of glasses
Find out if you Have Binocular Vision Dysfunction AND GET THE CARE YOU NEED TODAY
Prism lenses could treat any muscle condition, neurological issue, or other eye condition that causes you to see double or causes your eyes not to align correctly:
Stroke
Head injury
Multiple sclerosis
If the thought of looking through triangular prisms has you perplexed, you are not alone. Prism glasses take some knowledge to understand.
There are different reasons you may experience double vision or other conditions treated by prism glasses . When you&#;re seeing double, your eyes aren&#;t working together to focus on a single object at the same time.
Prism lenses
bend light into your retina at a different angle than your standard prescription glasses. Prismatic effect is created by making one part of the lens thicker than the other, causing light (and the image it is carrying) to bend in a specific direction.
Like corrective lenses, prism correction comes in different powers. You might only need a small amount of prism if your eyes are slightly misaligned, but you could need a higher power lens if you&#;re dealing with a neurological issue that&#;s severely impacting your vision alignment.
You probably have a prescription for nearsightedness, farsightedness, or astigmatism if you normally wear glasses . These common vision problems happen because your cornea is uneven or your eyeball isn&#;t spherical.
Traditional glasses are curved to compensate for your eye&#;s natural shape. For example, nearsighted people tend to have elongated eyeballs, which causes light to focus in front of the retina. Farsighted people have shorter eyeballs, which causes light to focus past the retina. Traditional corrective glasses have curved lenses that bend light differently than prism lenses; they refocus light directly to the retina so you can see clearly.
If you are experiencing any symptoms of binocular vision dysfunction , vertical heterophoria, or long-term eye difficulties that have gone unsuccessfully treated, prism glasses might be the solution you need. Contacting your optometrist OR eye care professional for an eye exam is the first step to a correct diagnosis and getting prism glasses made for you.
During your exam, your doctor may perform a variety of tests on your eyes to determine if prism lenses would be beneficial. Three common evaluations include:
Hirschberg Test: The Hirschberg Test check for strabismus . A pen light is aimed at the eyes where the light's reflection should appear in the center of the pupil in both eyes. If the reflection is off-center in either or both eyes, strabismus may be present.
Krimsky Test: In this evaluation, the degree of misalignment is calculated. While a pen light is aimed at the eyes, prisms of different strengths are placed in front of the eye. As the prism reflection is brought to the center of each pupil, the correct misalignment measurement can be found.
Cover Tests: There are multiple types of cover tests, including the cover/uncover test, prism and alternate cover test, and the Maddox Rod test &#; all of which include a variety of testing individual eyes for sight ability and strength.
If you have the right prescription and your glasses are aligned correctly, you should notice a marked reduction or complete elimination of your vision symptoms altogether. Prism glasses are designed to be a solution from the minute they are put on.
optec Product Page
Related links:There are no potential side effects associated with prism lenses or glasses . The major appeal to this vision solution is the absence of invasive treatment or surgery needed to address the eyesight concern. With no recovery time necessary, and an immediate improvement to vision symptoms, prism glasses are a growing solution for individuals suffering from non-traditional eyesight complications.
Find out if you Have Binocular Vision Dysfunction AND GET THE CARE YOU NEED TODAY
If you have
BVD
or any other condition causing vision misalignment, contact
Vision Specialists of Michigan
to see if prism glasses can be a solution for your visionary needs, and an improvement in your quality of life.
Filed Under: Blog,
Several years ago I blogged about the pilgrimage of people to England to receive &#;special prism glasses&#; for reading. Rather than abating, the concept has intensified. It is both interesting and insightful to see some of the discussions around this on forums in the public domain. Here is one thread that began in with more active discussion in , as well as a parallel thread addressing the same topic. Social media is progressively fueling interest in visual issues, particularly among populations who place a premium on reading and learning.
A parent recently acquainted me with a book written this year by reading specialist Sara Shain, a member of the Orthodox Jewish Community in the metro New York region. From Zero to Hero has a brief section mentioning the possible help that struggling students can derive from prism glasses or vision therapy, and I particualrly like the header of this section noting that the persistence of these problems poses emotional health risks:
Because we are seeing progressively increasing numbers of Orthodox patients, I thought it might be of interest to add an historical footnote to the discussion. I was raised in an Orthodox home in the Logan section of Philadelphia, a ten block radius encompassing nearly as many houses of worship as there are Starbucks stores in Manhattan. My father was an optometrist who had his office in our house, and I attended the Pennsylvania College of Optometry located only a mile from his office. This afforded a unique opportunity to incorporate what I was learning into the flow of a private practice.
At the same time there was an ophthalmologist practicing nearby by the name of Samuel I. Askovitz. Naturally in a small neighborhood with only two ophthalmic practices, there were times when Dr. Askovitz would examine our patients and vice-versa. I noticed that we were consistently seeing patients of Dr. Askovitz who had small amounts of prism in their glasses. The prisms were in interesting combinations, both in direction and magnitude that I was at a loss to explain based on anything that I was learning in school which focused on prescribing prism only to compensate for double vision or eye strain. I asked my father about it, who scratched his head and said with dry wit that perhaps Dr. Askovitz&#;s phoropter was miscalibrated.
It turned out that Dr. Askovitz had an unorthodox intuition that he was successfully applying to his orthodox population over fifty years ago. Nor was this a coincidence. In the bio of an article that he authored for the Journal of the American Statistical Association in , Dr. Askovitz listed his main fields of interest in this order:
Around this same time, in the s, optometrists working in the field of learning issues actively promoted the prescribing of low power plus lenses for near, in single vision or bifocal form. The prescribing of analogous low power prisms was generally frowned upon, with the concern about &#;prism adaptation&#;. Dr. Askovitz favored low power prisms, which had the advantage of being incorporable into a single vision lens (or multifocal) without any concern for distance vision blur. The type of adaptation that might occur for patients using prism to offset double vision did not occur with this population. To insure against this, patients would return to his practice to have the power, direction, and symmetry between right and left eyes fine tuned. With a nod to the pioneering principles of Dr. Askovitz, we have come full circle in combining all the modern means at our disposal: creative prescribing of lens and prism power and orientation including lens coatings and tints (and speciality considerations such as the Shaw Lens), as well as optometric vision therapy.
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