If you're seeing double of everything or have been diagnosed with BVD which stands for Binocular Vision Disorder, you might need a pair of prism glasses to help align and correct your vision.
Our guide below will take you through more about what prism in glasses are, who needs them, and how they can treat double vision, as well as where to shop for the best prism glasses for double vision.
What Is Prism?
Prisms are triangular shapes that are made of plastic or glass to disperse light in a spectrum or change the way that light is reflected.
What Is Prism In Glasses?
Prisms in glasses are used to change the way light is reflected into your eye, if you suffer from eye muscle weakness then you might have double vision due to this eye strain.
Prism glasses work by aligning the image in both eyes into a singular image and tricking the brain into producing this clear image. This prism correction can be incorporated into your normal lenses, it does not correct farsightedness or nearsightedness.
Prism in glasses comes in different powers, you might only need a small amount of prism or more power if you're suffering from severe double vision.
What Do Prism Glasses Look Like?
So, what do prism lenses look like? Prism lenses look the same as any other kind of glasses except they might seem a bit thicker from the side, you can always choose glasses with a thicker frame to hide this.
You wear prism glasses all through the day to stop BVD symptoms or double vision symptoms coming back such as headaches or dizziness.
Who Needs Prism Glasses?
Prism glasses can be used to treat any eye condition where your vision doesn’t align correctly.
These are the main causes as to why someone would need prism glasses -
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Binocular visual dysfunction
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Strabismus
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Graves’ disease
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Convergence insufficiency
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Myasthenia gravis
Brain problems such as strokes, migraines, head injury, tumors, diabetes, and MS. BVD is one of the most popular causes of double vision. It means you have vision misalignment, and your brain struggles to see one singular image, the result of this eye strain is headaches and other uncomfortable symptoms.
Common Eye Tests For Prism Glasses
If you think you might have BVD or other eye misalignment problems causing double vision, you would need an eye test to confirm your diagnosis and make you eligible for prism correction glasses.
Three common tests for working out if you need a prism in glasses are
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Cover tests - Tests for basic eyesight ability and strength by uncovering one eye and covering the other then looking for movement.
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Hirschberg Test - This checks for strabismus by holding a pen light in both eyes, if the reflection is off-center then it indicates strabismus.
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Krimsky Test - Penlight is aimed at the eye and prisms of different strengths are shown. This calculates the correct vision misalignment measurement.
Prism Glasses For Double Vision
So, what prism glasses for double vision do you need? Well, first of all you need your prism correction prescription which will have a PRISM section that relates to the strength, and a BASE section which shows which orientation your prism should be.
Glasses for double vision will take some time to get used to as your vision realigns and adjusts, but symptoms of strain such as headaches should disappear on the first day.
The cost of prism glasses varies according to your prescription.
Finding The Best Prism Glasses At Glassesshop
At GlassesShop, we have 1800 frame types and customizable lenses for our prescription glasses and sunglasses, simply choose a pair you fancy, enter your customizations, and order.
We offer a try-before-you-buy service or a virtual try-on tool before you commit to your pair of glasses. All of our glasses have 365-day guarantees for buyer's protection too.