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Blue Light Therapy Quiz
by Staff
Think you've an expert on acne treatment? Take this quiz and test your knowledge of blue light therapy for acne treatment.

Out of the three types of photodynamic therapy (PDT), blue light therapy has been the most widely studied.

  • fact
  • fiction
  • almost fact: Blue and green have been studied the most.

PDT disintegrates acne lesions with intense light.

  • fact
  • fiction
  • almost fact: Light therapy kills the bacteria that infects acne lesions.

A full blue light therapy treatment usually involves three sessions over a six-week period.

  • fact
  • fiction
  • almost fact: Just one hour-long session is generally all that's needed.

A blue light therapy session lasts about a half hour.

  • fact
  • fiction
  • almost fact: A session is 15 minutes long.

Once you've had a full treatment, you're good to go -- your acne is totally eradicated.

  • fact
  • fiction
  • almost fact: This is true for most patients, but severe cases will need more treatment.

The treatment is temporary because the light waves don't penetrate the endocrine glands deeply enough.

  • fact
  • fiction
  • almost fact: The light targets bacteria in the sebaceous glands.

Blue light therapy is safer than earlier light treatments because it doesn't contain ultraviolet light.

  • fact
  • fiction
  • almost fact: Blue light therapy is safer because the wavelengths are very long.

In a large study, blue light therapy caused a 59 percent decrease in acne lesions.

  • fact
  • fiction
  • almost fact: There haven't been any large studies of blue light therapy.

Most insurance plans don't cover blue light therapy.

  • fact
  • fiction
  • almost fact: Recently, more and more plans have started covering it.

You can expect to pay $200 to $300 for each blue light therapy session.

  • fact
  • fiction
  • almost fact: It's not that expensive -- usually around $100 per session.