Many Axon Optics customers suffer from Blepharospasm, an abnormal, involuntary blinking or spasm of the eyelids. Light sensitivity is common to Blepharospasm. Axon Optics glasses block the light that has been implicated in triggering reactions and can worsen the condition. Our frames have a 30 day return policy should you find them ineffective. Please let me know if you have any other questions.