system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How do clear sunglasses work?

Are clear sunglasses better or worse than traditional sunglasses?
gpt
The medical purpose off sunglasses is to protect your eyes from UV radiation. The secondary purpose is to give your eyes rest from bright light.

While traditional sunglasses have dark glasses, this is not necessary to block UV light. The purpose of the dark glasses is to give your eyes some rest so you don't get bothered by reflecting surfaces or the bright light itself.

The problem is that while some cheap sunglasses might give your eyes this comfort they do not always block the UV radiation. Thus still letting it damage and possibly burn your eyes.

So to come back on your question: Clear sunglasses are healthier for your eyes than cheap normal sunglasses because they are specifically designed to block UV light. Though they will not give your eyes relief from the bright light so they're worse for tasks that need your focus and attention (like driving for example).