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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.
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
yanggu supply professional and honest service.
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,
Author: Dr. Randy Schulman
EyeCare Associates, CT
More recently, people are hearing more and more about prism glasses for a variety of vision problems. Prism glasses are typically prescribed for people who are experiencing double vision, as these lenses help to merge the two images into one clear image.
The following list includes the most common symptoms of vision conditions that may be alleviated with prism lenses:
Prisms can be used as a therapeutic tool to provide the following benefits:
Prisms may also be prescribed for the treatment of vision problems associated with:
Since double vision can be a sign of a serious health condition, it is important to see your doctor as soon as possible to determine the cause.
If you experience eye strain or double vision, contact an eye doctor near you, who can diagnose and treat any underlying visual problem.
SEE RELATED: How Are Prisms Used in Vision Therapy?
In normal vision, the two eyes work in tandem by pointing at the same image, simultaneously. Each eye collects distinct visual information to be sent to the brain for processing. The brain then combines the visual input from each eye to produce a single image for you to see clearly.
Double vision occurs when the two eyes are not aligned properly and are unable to work together to point in the same direction, at the same time. As a result, the brain is unable to accurately process the distinct visual input from the two eyes to form a clear, single image.
Prisms work by moving the image to correct alignment for one eye or both eyes.
For example, if one eye is turned outward, a base-in prism may be used to move the image to accommodate for the position of that eye. If one eye is higher or sees an image higher than the other eye, a base-down prism may be used to accommodate for that eye and move the image up.
Very often, eye doctors will prescribe more than one pair of prism glasses if varying prism powers are required for different activities. This is usually necessary if the two eyes are only misaligned intermittently or for certain distances, or when the eye turn occurs as a result of increased visual demand or fatigue.
Not only do prisms displace images to improve vision, they also facilitate changes in perception, as the base of the prism slows down the rate at which light enters the eye, causing objects to appear further away.
As a result, prisms can facilitate improved depth perception, posture, gait, and movement patterns.
Moreover, since prisms change the way light enters the eye and brain, they can have far reaching effects on the entire nervous system&#; affecting breathing, heart rate, muscle tonicity, and even attitude.
Vision therapy is an effective treatment for many different vision problems, including double vision.
While prism lenses will help to relieve your visual symptoms while wearing your glasses, vision therapy is a long term solution for your vision problems.
LEARN MORE: Guide to Neuro-Optometry
Schedule an appointment with an eye doctor for a comprehensive eye exam, and to discuss any questions you may have about prism glasses or vision therapy.
Prism lenses might be the best option for eliminating your eye strain or double vision.
Vision therapy retrains your eye-brain connections to improve your visual skills for clearer, single vision, with or without your eyeglasses.
Contact us to discuss your requirements of Optical Glass Prisms. Our experienced sales team can help you identify the options that best suit your needs.