Nearly 2/3 of adults experience the painful symptoms of eye misalignment, including chronic headaches, neck pain, eye strain and dry eye sensation. Fortunately, relief is in sight with Neurolenses, which go beyond visual acuity to restore naturally comfortable vision.

Does filtering blue light address the symptomology? No

Do behavioral changes like the ubiquitous "20-20-20 rule" address the symptomology? No

And while they can certainly improve a patient's visual clarity, "powerboost" lenses or more advanced progressive lens designs that purport to be made for digital viewing also don't address the symptomology.

Why? Because they don't address the underlying binocular issues. Only Neurolens and their patented contoured prism technology does.

 

neurolens utilizes patented technology to restore your naturally comfortable vision

 
 

The cause

A person’s eyes are located approximately 3cm on either side of their nose. When we focus on something such as a TV screen or smartphone we typically point our nose towards the target. This forces each eye to turn inwards slightly to lineup properly with the target. The spatial position of the eye (proprioceptive information) is sent from the eye muscles to the brain. The magnitude of this inward turn varies based on the target distance, from the extreme (trying to see the tip of your own nose) to the small (trying to see an airplane in the sky). For many, these “vergence” movements are fraught with small errors.

 

The effect

These small errors in eye alignment can initiate a cascade resulting in eye strain, headaches, neck pain, dry eye and/or motion sickness. Why? The answer lies in the trigeminal nerve—the largest nerve in the brain and the one responsible for most head, face, jaw and neck sensations. Importantly, proprioceptive information is sent to the brain via the trigeminal nerve. When there is a proprioceptive mismatch between misaligned eyes and your vestibular and muscular systems, this creates a neural conflict and leads to an inaccurate gaze response. This inaccurate response is continuously fed back to the visual system, which ultimately leads to the overstimulation of the trigeminal nerve. This overstimulation leads to a painful stimulation of several parts of the face and neck.

 

The solution

To alleviate this mismatch, eye misalignment needs to be addressed. Historically a glasses lens add-on termed prism has been incorporated to help reduce this misalignment, however it immediately becomes apparent that our eyes are typically more misaligned at near than far (remember from above, humans need to turn their eyes inward more to look at things close than they do for far away targets), and therefore more prism is required for near work and less for far. Neurolenses are the only lenses that now are able to address this gradient by incorporating a contoured prism into each lens therefore providing a larger magnitude in prism at the bottom of the lens than at the top. And multiple studies have found that even small amounts of prism have a profound impact on a patient’s visual clarity and comfort. In fact, Neurolenses consistently offer relief in the 80-90% range, depending on symptom.  And they’re risk free with a lifetime satisfaction guarantee. But these lenses work so well for so many people that the national return rate is less than 3%.

Calgary Vision Centre has the requisite equipment, training and lenses making us certified as an official Neurolens provider.