CLT Skin Rejuvenation & Resurfacing 3

Question 1

When treating periorbital wrinkles with an ablative CO2 laser, the minimum safe distance from the eyelid margin is typically:

Accepted Answer

3 mm

Answer

Treating within 3 mm of the eyelid margin risks ectropion, corneal damage, and scarring due to thin, delicate tissue.

Question 2

Antiviral prophylaxis before ablative laser resurfacing is recommended primarily to prevent reactivation of:

Accepted Answer

Herpes simplex virus

Answer

Ablative resurfacing disrupts the skin barrier and can trigger HSV reactivation, causing widespread painful eruptions across the treated area.

Question 3

What is the primary purpose of the cooling system in non-ablative laser skin rejuvenation devices?

Accepted Answer

Protect the epidermis from thermal injury

Answer

Epidermal cooling protects the superficial skin layers while allowing the laser energy to heat deeper dermal structures for collagen stimulation.

Question 4

Which endpoint is typically observed during a properly performed erbium:YAG ablative pass?

Accepted Answer

Pink chamois-like appearance of dermis

Answer

A pink chamois-leather appearance indicates correct papillary dermal depth, confirming adequate ablation without excessive thermal damage.

Question 5

A patient with a history of isotretinoin use within the past 12 months presents for fractional CO2 resurfacing. The appropriate action is to:

Accepted Answer

Postpone treatment for at least 6–12 more months

Answer

Isotretinoin impairs sebaceous gland function and wound healing, increasing the risk of scarring; most guidelines recommend waiting 12–24 months after cessation.

(CLT) Certified Laser Technician Practice Test

(CLT) Certified Laser Technician Practice Test

CLT Skin Rejuvenation & Resurfacing 3