BK7 prism

If you suffer from double vision, a pair of eyeglasses with prism lenses can help keep your eyes focused, improving your vision tremendously.

Double vision is caused by light entering the eyes at the wrong angle, which sends two different images to the brain. Eyeglasses with prism lenses eliminate double vision.

Prism lenses look just like any other eyeglasses! The thickness of the lens will vary based on the prescription, so some will be thinner than others. However, the lenses in prism glasses are ground to a different shape than most other prescriptions: the apex of the lens will be thinner than the base. This is usually unnoticeable unless you are inspecting the glasses carefully.

Glass prism

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No, these DIY privacy shades will not block all infrared light. They will only block a portion of it, depending on the thickness of the IR-blocking film used. Thicker film will block more infrared light, but may also affect the clarity of your vision.

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Our 365-Day Guarantee means you’re eligible for a one-time replacement pair within 12 months of purchase if there are clear defects in material and workmanship — so be good to your glasses!

Thorlabs Prism

You should only experience one side effect from prism eyeglasses: corrected vision. If prism glasses wearers experience wandering or misaligned eyes, headaches, pain accompanying eye movement, facial or eye pain, nausea, or seeing double images, they should see an eye doctor immediately. These side effects can be caused by misaligned frames, an incorrect prescription, or a change in the body, but it is important to figure out what is causing these symptoms.

Yes, you can use any type of sunglasses with polarized lenses to make DIY privacy shades. However, it is recommended to use sunglasses with larger lenses to ensure full coverage and protection from infrared light.

Start by cleaning the lenses of your sunglasses with a microfiber cloth. Then, cut the IR-blocking film to fit the lenses of your sunglasses. Use the heat gun or hair dryer to warm up the film and carefully apply it to the lenses, smoothing out any air bubbles.

A prism is a shape with flat, transparent surfaces that bends light. Some people suffer from double vision caused by their eyes not focusing on the same location. Adding a prism shape to eyeglass lenses bends light travelling into the eye in such a way that it aligns what each eye is seeing, eliminating the double image interpreted by the brain.

Optical prism glasses

The cost of your prism lenses will depend on the frames you choose, but will not be much more expensive than any other prescription glasses you order from EyeBuyDirect. Even if you choose high index lenses for strong prescriptions, when you order from us, you’ll save hundreds of dollars compared to what prism lenses cost elsewhere.

To make your own IR-blocking sunglasses, you will need a pair of sunglasses with polarized lenses, a roll of IR-blocking film, scissors, and a heat gun or hair dryer.

Yes! While patients with double vision are often advised not to drive, if their diplopia can be controlled with prism glasses, they should have no trouble doing so safely. One of the great benefits that come with correcting double vision is being able to see clearly, which makes driving much safer.

At EyeBuyDirect, quality eyewear is a guarantee. If you’re not fully satisfied with your glasses, simply contact us for a refund or replacement.

Types of opticalprisms

We want you to be 100% happy with your eyewear. With 14-Day Free Returns, you can get a one-time replacement or refund within two weeks of receiving your order — no questions asked!

Optical Prism Cube

Depending on your needs, one lens of your prism glasses may be slightly thicker than the other. You might like to choose a thicker frame style to cover the edges of the lens more completely. If this doesn’t bother you, you aren’t restricted in the style of frame you choose at all, so take your pick.

Light normally enters your eyes through the cornea before it reaches the retina. In eyes with normal vision, the light hits the same place on both retinas, which creates a single image in the brain. People with double vision have light reaching different parts of each retina, which produces two separate images. Prism lenses bend light and redirect it to reach precisely the same spot on each retina. Then the brain steps in and combines the two images into one crystal-clear image.

Yes, these DIY privacy shades are safe to use as long as they are applied correctly and do not obstruct your vision. However, it is important to note that they may not provide the same level of protection as professionally-made IR-blocking sunglasses.

The thickness of prism lenses will vary by prescription, but generally speaking, they are not very thick–certainly not noticeably thicker than other prescription glasses. A very high prism prescription may be noticeably thicker towards the bridge of the nose, but using high index lenses can ensure a thin, lightweight lens. If you are concerned about the appearance of thick lenses, you may want to choose a full-rimmed frame to conceal the edges.

If you need prism correction, you will have a separate set of numbers on your prescription that indicate the vertical and/or horizontal angle needed to correct double vision.

After selecting a frame, you can add a prism prescription to your lenses by clicking ‘Show more options’ in the lens usage section, checking the ‘add prism’ box and entering your prism prescription numbers.

Our 365-Day Product Guarantee allows a one-time replacement pair of eyewear within 12 months, if any defects in the material or workmanship are found that prevent you from enjoying your frames to the fullest.