Chemistry & ElectricityCâu 89 / 100
Which statement about LED light therapy as used by estheticians is accurate?
a.LED light burns away the outer layer of skin like a laser
b.LED is a non-thermal, non-ablative light, with blue light commonly used for acne-causing bacteria and red light for stimulating and calming; eye protection is required
c.LED is a laser device that estheticians may operate freely
d.LED has no contraindications of any kind
Giải thích
LED panels emit low-level, non-thermal light that does not ablate tissue, with blue wavelengths targeting acne bacteria and red wavelengths used to stimulate and calm, and clients and practitioners should wear eye protection. LED is not a laser, and lasers are outside esthetic scope in California. Contraindications include photosensitizing medications, seizure disorders, and recent eye surgery.
Luyện miễn phí toàn bộ 100 câu hỏi — không cần đăng ký.
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Đội Ngũ Biên Tập PrepPass · Đối chiếu với California Esthetician Written Licensing Exam · Quy trình kiểm tra