{"id":7492,"date":"2020-08-23T10:31:00","date_gmt":"2020-08-23T10:31:00","guid":{"rendered":"https:\/\/www.optometrists.org\/?page_id=7492"},"modified":"2021-08-10T09:39:39","modified_gmt":"2021-08-10T09:39:39","slug":"what-are-prism-lenses","status":"publish","type":"page","link":"https:\/\/www.optometrists.org\/vision-therapy\/neuro-optometry\/what-are-prism-lenses\/","title":{"rendered":"What Are Prism Lenses?"},"content":{"rendered":"

Prism lenses can be effectively used to treat vision conditions, such as double vision and other binocular vision difficulties.<\/b><\/h2>\n

One of the most common uses for an eye doctor prescribing prisms is to treat a condition known as Binocular Visual Dysfunction (BVD).<\/a><\/p>\n

Prisms, by definition, are triangular in shape, and made of plastic or glass for the purpose of dispersing light into a spectrum, or changing the direction in which light is reflected.<\/p>\n

Prism lenses are special lenses that are prescribed by eye doctors and infused into regular lens prescriptions. They do not contain any focusing power, and therefore cannot correct any refractive errors.<\/p>\n

Prisms \u201ctrick\u201d the eye into believing that an object is in a different location in order to improve eye alignment. This helps the eyes to perceive images in a way that single vision can be achieved\u2014 improving binocular vision, and reducing double vision, headaches, reading difficulties, and more.<\/p>\n

A prism lens can be base out, base in, base up, or base down, depending on the way the eye is turned or misaligned.<\/p>\n

When are prism lenses prescribed?<\/b><\/h2>\n

Prism lenses are prescribed for patients who suffer from severe binocular vision difficulties and double vision, most commonly resulting from:<\/p>\n

Visual problems caused by:<\/p>\n