I use these glasses while watching TV, reading on my phone, and while using my Reader. I have been using them for about 8 months and they have held up nicely. No cracks or scratches! They are stylish and fit nicely. I find them light in that they don’t bother me behind my ears or on the bridge of my nose like most glasses do. Hopefully they are protecting my eyes from blue light but, honestly, I have no way of knowing.