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LASER EXAM QUESTIONS AND ANSWERS
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LASER EXAM QUESTIONS AND ANSWERS
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LASER EXAM QUESTIONS AND ANSWERSHow does laser hair removal work mechanically - Answers-It heats the follicle to severly
damage or destroy it.
What is 'permanent' hair reduction according to the FDA - Answers-A long term stable
reduction in the number of hairs re-growing after a full treatment regime.
What are terminal hairs - Answers-The coarse hairs such as scalp, armpits, eyebrows
What are vellus hairs - Answers-The finer peach fuzz type hairs all over the body
Which is the preferred target for laser hair removal - Answers-Dark hairs
Which is the correct skin structure starting from the outside - Answers-Epidermis,
dermis, basement membrane, subcutaneous tissue
From where does the hair growth arise and is the laser target for destruction - Answers-
Hair follicle
In which layer of our skin is the stratum corneum - Answers-Epidermis
What best describes the term chromosphere, in terms of laser use - Answers-The object
that absorbs the light
What chromophore in the skin primarily competes with the hair follicle in absorbing light
- Answers-Melanin
What can happen with excess heating of the skin - Answers-Scarring,
hypopigmentation, hyperpigmentation
What are the adverse consequences of excess heating in the skin deeper than the
basement membrane - Answers-Third degree burn, resulting in scarring and possible
keloid scars
What chromophore in skin primarily give it color - Answers-Melanin
The Fitzpatrick skin classification system takes into account: - Answers-Skin color and
sensitivity to sunlight
Which Fitzpatrick skin type has the darkest color - Answers-VI
Which Fitzpatrick skin type would be the hardest to achieve laser hair removal because
of competing chromophore - Answers-VI
, Which hair color would be easiest to remove by laser, ignoring skin color - Answers-
Black
Which hair color is impossible to remove with a laser - Answers-White
What is the anagen phase of hair growth - Answers-The growth phase
What is the catagen phase of hair growth - Answers-The regression or resting phase
What is the telogen phase of hair growth - Answers-Dormant or resting stage - where
hairs fall out
What stage of hair growth is most amendable for laser treatment (removal) - Answers-
Anagen
What happens to the hair shaft at the end of the hair growth cycle - Answers-It falls out
Are all of our hairs in any body area in the same phase simultaneously - Answers-No
What is the primary reason that multiple treatment sessions are required for successful
laser hair removal - Answers-Not all hair follicles are in the correct growth phase at the
same time
Aside from the scalp area, what range is typical for the hair growth cycle in most other
body areas - Answers-4-6 weeks
Even though the Fitzpatrick scale does not include hair color, because of sun sensitivity
red heads would always be considered a Fitzpatrick type: - Answers-I
The wavelength of a laser is also its: - Answers-Type of laser
Visible light occurs in which general wavelength range - Answers-400-700 nanometers
(nm)
The alexandrite laser produces light at: - Answers-755 nm
The Nd: Yag laser produces light at: - Answers-1064 nm
The ruby laser produces light at: - Answers-694 nm
Power output in watts measures: - Answers-The rate of energy delivered, but not
amount
Energy output in Joules measures: - Answers-How much energy is delivered
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