Prism For Vision Correction

by Nov 7, 2023

When it comes to vision correction, glasses serve a crucial role in improving visual acuity. However, in some cases, simply correcting refractive errors such as nearsightedness or astigmatism may not be sufficient to address certain visual conditions. This is where the inclusion of prism in glasses becomes necessary. Prism can help improve fusion, alleviate eye strain, and correct eye turns or double vision. In this blog, we will explore why prism may be needed in glasses and the benefits it offers.


Prism in Enhancing Fusion and Combating Double Vision

Prism is capable of inducing a prismatic effect in glasses, meaning it can alter the way light enters the eyes and how the images are perceived. One common application of prism glasses is to help individuals who experience double vision, known as diplopia. Double vision can occur intermittently or persistently and poses challenges when it comes to merging the two images into a single cohesive image.

By incorporating a prism into glasses, the image seen by one eye can be subtly shifted or moved in a specific direction. This adjustment helps the brain to fuse the images from both eyes, resulting in a single and clear image. Prism glasses help individuals effectively manage and overcome double vision, enhancing their overall visual experience.


Alleviating Eye Strain and Enhancing Comfort

Eyestrain is a common complaint for people who engage in activities that require intense visual focus, such as reading or working on a computer for extended periods. The strain can manifest as eye fatigue, headaches, or blurred vision. Prism glasses can be beneficial in these situations as well.

By introducing a prism into the glasses, the images seen by each eye can be manipulated to achieve proper eye alignment and coordination. This helps reduce the strain on the eye muscles by allowing them to work more harmoniously. As a result, individuals experience improved comfort, reduced eye fatigue, and enhanced visual performance during near-work activities.


Correcting Eye Turns and Preventing Reduced Vision

Prism glasses also play a vital role in correcting eye turns, medically known as strabismus, where one eye deviates from its normal alignment. An eye can turn inwards (esotropia), outwards (exotropia), upwards (hypertropia), or downwards (hypotropia). Besides cosmetic concerns, an eye turn can lead to double vision or reduced vision in an eye (amblyopia).

By using prism glasses, the image seen by the deviated eye can be shifted toward the straight-ahead position. This adjustment helps realign the eyes and prevent double vision, enabling individuals to see clearly with both eyes and promoting binocular vision. For those with reduced vision due to an eye turn, prism glasses can aid in improving visual acuity in the affected eye.


Customized Precision for Optimal Results

It is important to note that the use of prism in glasses should always be prescribed and customized by an eye care professional. The amount, direction, and location of the prism are specific to each individual’s needs and vision condition. The optometrist or ophthalmologist will perform a comprehensive eye examination, evaluate eye alignment, and recommend the appropriate amount and type of prism to achieve the desired visual correction.


Our eye doctor at Brooklyn Eye Care excels in the prescription of glasses, contact lenses and the diagnosis of a variety of eye diseases. Call our optometrist at (763) 999-6116 to schedule your appointment today if you would like to learn more about prism and how it assists vision. Our eye doctor, Dr. Vivian Ekemezie provides the highest quality optometry services and eye exams in the Brooklyn Park, MN area. 

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