Red lens glasses block close to 100% of both blue and green wavelengths. While many glasses only block blue light, recent studies have shown that lower wavelengths also significantly affect sleep patterns. We block all wavelengths below 550 nm, which includes blue, green, and violet light.

**BLOCKS BLUE & GREEN LIGHT:** In addition to blue light, green light also suppresses melatonin production and prevents restful sleep. These lenses block both blue and green light to help ensure you have a productive night’s sleep!

**RELAX & SLEEP:** You will feel an immediate physiological effect when you put these on. You’ll feel relaxed and ready for bed by wearing them 1 to 3 hours before bedtime. Less time wasted lying in bed means more time getting deep, restful sleep!

**PERFECT FOR TRAVELERS & SHIFT WORKERS:** Do you work at night and sleep during the day? Sleep Savior glasses will help you achieve quality daytime sleep. Put an end to jet lag and sleep through your flights.

Best results from wearing these glasses will vary by individual. It is recommended to use them for 30 minutes to 2 hours before bedtime. We encourage you to experiment and find what works best for you.

Note: Red lenses block 100% of blue light but are too dark for outdoor use and not suitable for extended wear. They are intended for use only before sleep to help improve sleep quality.

Orange lenses block 99% of blue light, are category 3, and are suitable for long-term wear.

NOTICE: if your eyes had astigmatism or higher degree, please order "customized listing" and leave your prescription to us.Please kindly note that, the handling time for customized glasses needs about 15 working days.