Silly ravers:

Dozens of partygoers at an outdoor rave near Moscow last week have lost partial vision after a laser light show burned their retinas, Russian health officials said on Monday.

"They all have retinal burns, scarring is visible on them. Loss of vision in individual cases is as high as 80 percent, and regaining it is already impossible," Kommersant quoted a treating ophthalmologist as saying.

Attendees said heavy rains forced organizers to erect massive tents for the all-night dance party, and lasers that normally illuminate upwards into the sky were instead partially refracted into the ravers' eyes.

You're not supposed to stare directly into powerful lasers? Now you tell me!

But as long as we're on the subject, I have a few more important safety tips to share with first-time ravers:

Top Ten Rave Safety Tips

10. The liquid in glow sticks is not actually an energy drink.

9. The unmarked pill from the 40-something guy dancing by himself? It's not a "totally safe, conciousness-expanding, brand-new kind of Ecstasy" — it's just a roofie. (H/T: Vox)

8. All the dancefloor suds machines in the world won't make a dent in your B.O. Take a shower already.

7. Avoid Chinese pacifiers due to the high lead count.

6. Bleeding from the ears is abnormal.

5. The human brain requires more than four hours of sleep a week.

4. Don't be the moron singing "Beep-boop-boop-di-ditdit-boop-beep-bip" along with the music.

3. Two words: comfortable shoes.

2. No, it's not that I'm "not down with the scene." You really do look like a dork.

1. In case you missed it the first time: don't stare directly into powerful lasers!