Take 35 pointplease help Q: choose the best correct answer

.1. During the treatment of hyperopia with

PRK, the curvature of the anterior corneal

surface must

A: be flattened.
B: remain unchanged.
C:
be steepened.

2. Er:YAG lasers are not suitable for the

treatment of caries because of

A: cytotoxicity.
B: low efficiency.
C:
thermal effects.

3. Angioplasty with excimer lasers is

likely to induce

A: atherosclerosis.
B: restenosis.
C:
thermal injury.
4. In stapedotomy with Er:YAG lasers, the

fluence should be limited to

A: 1 J/cm2.
B: 10 J/cm2.
C: 100 J/cm2.

5. The deepest layer of the skin is called:

A: dermis.
B:epidermis.
C: subcutis.
D:
fat tissues​