Principle Explanation:

The reflective prism, crafted from high-quality optical materials, enables users to effortlessly read books, watch television, and perform other activities while lying in a supine position.
Changing the sight perspectives of wearer, breaking the rules of watching things, allowing users watch the images in front of them naturally, conveniently, comfortably and distinctly in a lying position
Fit for men and women
Extremely beneficial to people's physical and mental health
Amazing glasses can effectively prevent and lessen the fatigue and discomfort of the neck, the lumbar vertebra and the shoulder portion.

TIP
The first time you wear will have a sense of dizziness, this is normal, wear the use of recommended every half hour to take a break;
If the subtitles or TV sreen is too small,it will appear unclear;
Wear glasses each time for 30-60 minutes,then to rest for 15 minutes.it's better for your eyes.