Most sunglasses make all colors of the spectrum dimmer, not just that portion of the spectrum that’s especially irritating. As a result, one must wear glasses that are fairly dark in order to get the desired effect. Unfortunately, by wearing dark glasses, even though one may feel better temporarily, once the glasses come off, the light sensitivity can become much worse! By wearing dark glasses, the eye “dark adapts” and becomes more sensitive to light. Think of what it’s like to go outside after being in a matinee for 2 hours. The afternoon light is blinding until your eyes re-adapt to the light. Dark-Adapting your eyes is a common problem for migraineurs and other sufferers of light sensitivity.
Axon lenses are specifically engineered to help people with light sensitivity, which often occurs to fluorescent light, partly due to the spectrum of emitted light and partly to the flickering fluorescent lights. Although Axon Eyewear is not a “cure” for light sensitivity, migraine, or blepharospasm, the majority of sufferers have found it to be extremely helpful, enabling them to return to work, school, and church. Because it primarily blocks that portion of the visible spectrum that’s irritating, Axon’s tinted glasses provide comfort without “dark-adapting” the eyes.
According to a pair of studies from researchers at the University of Utah Health Sciences Center, FL-41 lenses, designed to block certain wavelengths associated with light sensitivity, are better than gray- or rose-tinted lenses when it comes to decreasing the effects of light sensitivity in patients with benign essential blepharospasm (BEB). Patients who suffer from BEB, a condition that causes rapid blinking or eyelid spasms, have the same type of light sensitivity issues as people who have migraines. The studies compared the effects of wearing FL-41 lenses, rose-tinted lenses and gray-tinted lenses in a group of 86 patients, including 56 with BEB and 30 healthy controls. At the end of the study, the researchers found the FL-41 lenses reduced both blink rate and eyelid spasms in the BEB groups while also providing superior improvement in light sensitivity and reading compared to the other lenses.
You can find additional information at https://www.axonoptics.com/migraine-studies/
Source: Blackburn MA, Lamb R, Digre KB et al. FL-41 Tint Improves Blink Frequency, Light Sensitivity, and Functional Limitations in Patients with Benign Essential Blepharospasm. Ophthalmology. 2009. 116:997–1001,http://www.ncbi.nlm.nih.gov/pubmed/19410958