Eyeglasses are usually designed to correct a refractive error - when the shape of your eye keeps light from focusing correctly on your retina, compromising your vision. This is the most common type of vision loss, resulting in blurred vision - often seeing double or triple of something.
However, some patients have blurred or double vision due to light falling on different parts of the retina, but it is unrelated to their eye shape. In these cases, prism correction may restore vision.
Read the rest of this article at https://eyetoeyefamilyvisioncare.com/what-is-prism-correction/
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