We offer a 60-day home trial period, and if you're not satisfied with how the glasses can help manage light, you may return them in original condition (no scratches or distortions). It's important that your glasses are worn before the light-triggered pain becomes unbearable. Research has shown that light-triggered pain can be worsened through continuous exposure to light. If you feel that your glasses aren’t helping you manage light as a trigger, we suggest wearing your glasses continuously throughout your day (and while in front of any digital screens or under harsh lighting) for at least two weeks so you can be sure about whether they're helping you manage light. Note: Due to the precision filtration properties of the Avulux lens, Axon Optics glasses are not suitable for driving.