The Benefits of Using optical prism

Prism lenses can improve vision for clearer, more comfortable binocular vision. 

Prism lenses, also called yoked prisms, are often prescribed by eye doctors for patients who are experiencing double vision, or are having difficulty with binocular vision.

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In some cases, prisms are prescribed to be infused into lenses for daily wear. In other cases, prism lenses are used as a therapeutic tool in order to improve the patient’s attention, improve eye-brain connections, and provide feedback.

Yoked prisms can help to improve the communication between the eyes and brain to increase accurate visual processing.

Yoked prisms are added to prescription eyeglass lenses to enhance the way light focuses onto the retina in the back of the eye, for clearer, more comfortable vision. Prisms are unable to focus light in the way corrective lenses can, but they are able to deflect light, thereby improving the way light is focused.

Prisms are also able to change the timing of when light enters the eye, and therefore can have a positive effect on the visual, auditory, vestibular, and proprioceptive systems.

Schedule an eye exam with your vision therapy eye doctor so that they can diagnose and treat your binocular vision problems.

SEE RELATED: What’s the Deal with Prism Lenses?

Yoked prisms and vision therapy

Yoked prisms are used during vision therapy for a variety of vision conditions:

• Strabismus (crossed-eyes)
• Motion sickness
• Vestibular disorders
• Drooping eyelid (ptosis)
• Learning disabilities
• Adapting to multifocal lenses
• Head trauma or brain injury

Yoked prisms can help train the eye-brain connections, to improve the visual skills needed for clear and comfortable binocular vision.

Yoked prism lenses can help to improve:

• Eye tracking
• Eye movements
• Eye-brain communication
• Sports performance

Benefits of prism based vision therapy exercises 

Using prisms during vision therapy has many benefits:

• Prisms create changes in the eyes and brain, and enhance depth perception.
• Prisms enable objects to appear in a different location, “tricking” the eye into an aligned position.
• Prisms enable clearer, more comfortable binocular vision.
• Prisms enable the eye doctor to measure changes in the patient’s eyes, as they practice their exercises.
• Prisms enable free movement during vision therapy exercises, while other therapeutic tools may restrict movement or peripheral vision.

How do prisms enhance vision therapy?

Vision therapy exercises stimulate accommodation, peripheral awareness, eye movements, convergence, and other visual skills. Prism-based therapy exercises can facilitate changes in all of these visual skills areas.

Prism lenses also facilitate changes in posture, balance, coordination, and cognition.

While wearing prism lenses during therapy sessions, the patient not only receives visual information, but also vestibular, proprioceptive, and tactile information. All of this new information forces the patient to be aware and actively involved in the learning process, as their “new” vision is trained.

Yoked prism lenses are a powerful therapeutic tool that serve to actively train the brain for improved processing of visual information, and enhance the way vision therapy exercises are performed.

LEARN MORE:  Guide to Neuro-Optometry

If you suffer from a vision condition and think you can benefit from prism lenses, schedule an appointment with an eye doctor for a comprehensive vision evaluation.

Author: Dr. Randy Schulman

EyeCare Associates, CT

Has your eye doctor prescribed prism glasses or lenses?

More recently, people are hearing more and more about prism glasses for a variety of vision problems. Prism glasses are typically prescribed for people who are experiencing double vision, as these lenses help to merge the two images into one clear image.

If you want to learn more, please visit our website optical prism.

Why do I need prism lenses?

The following list includes the most common symptoms of vision conditions that may be alleviated with prism lenses:

• Double vision
• Headaches
• Eye strain and fatigue
• Neck, shoulder and back pain
• Dizziness, vertigo and lightheadedness
• Unsteady gait
• Postural problems
• Feeling anxious in crowds and big open spaces
• Difficulty reading, fatiguing, losing place, words running together, etc.
• Difficulty focusing and maintaining concentration
• Difficulty driving for long periods

What are the benefits of prism glasses?

Prisms can be used as a therapeutic tool to provide the following benefits:

• Alleviate diplopia (double vision)
• Reduce stress
• Increase comfort
• Increase sustaining ability on near tasks
• Increase efficiency
• Restore postural adaptation
• Provide control and protection against additional adverse adaptation

Prisms for the treatment of double vision 

Prisms may also be prescribed for the treatment of vision problems associated with:

• Muscle imbalance- Convergence insufficiency, convergence excess, esophoria, exophoria and hyperphoria
• Strabismus– Exotropia, esotropia and hypertropia
• Eye strain- Computer vision syndrome
• Visual disruptions- Visual field loss, poor depth perception
• Muscular problems- Myasthenia gravis, Grave’s disease
• Neurological problems- Migraines, traumatic brain injuries, stroke, tumors, concussions, multiple sclerosis, diabetes, bell’s palsy, dementia

Since double vision can be a sign of a serious health condition, it is important to see your doctor as soon as possible to determine the cause.

If you experience eye strain or double vision, contact an eye doctor near you, who can diagnose and treat any underlying visual problem.

SEE RELATED: How Are Prisms Used in Vision Therapy?

How do prism glasses work?

In normal vision, the two eyes work in tandem by pointing at the same image, simultaneously. Each eye collects distinct visual information to be sent to the brain for processing. The brain then combines the visual input from each eye to produce a single image for you to see clearly.

Double vision occurs when the two eyes are not aligned properly and are unable to work together to point in the same direction, at the same time.  As a result, the brain is unable to accurately process the distinct visual input from the two eyes to form a clear, single image.

Prisms work by moving the image to correct alignment for one eye or both eyes.  

For example, if one eye is turned outward, a base-in prism may be used to move the image to accommodate for the position of that eye. If one eye is higher or sees an image higher than the other eye, a base-down prism may be used to accommodate for that eye and move the image up.

Very often, eye doctors will prescribe more than one pair of prism glasses if varying prism powers are required for different activities. This is usually necessary if the two eyes are only misaligned intermittently or for certain distances, or when the eye turn occurs as a result of increased visual demand or fatigue.

What else do prism glasses do?

Not only do prisms displace images to improve vision, they also facilitate changes in perception, as the base of the prism slows down the rate at which light enters the eye, causing objects to appear further away.

As a result, prisms can facilitate improved depth perception, posture, gait, and movement patterns. 

Moreover, since prisms change the way light enters the eye and brain, they can have far reaching effects on the entire nervous system— affecting breathing, heart rate, muscle tonicity, and even attitude.

Do I still need vision therapy?

Vision therapy is an effective treatment for many different vision problems, including double vision.

While prism lenses will help to relieve your visual symptoms while wearing your  glasses, vision therapy is a long term solution for your vision problems.

LEARN MORE:  Guide to Neuro-Optometry

Schedule an appointment with an eye doctor for a comprehensive eye exam, and to discuss any questions you may have about prism glasses or vision therapy.

Prism lenses might be the best option for eliminating your eye strain or double vision.

Vision therapy retrains your eye-brain connections to improve your visual skills for clearer, single vision, with or without your eyeglasses.

Contact us to discuss your requirements of half ball lens. Our experienced sales team can help you identify the options that best suit your needs.