Hello Abhinav the answer is ��cm^2

Take 50 point

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.

i still se question marks

Step-by-step explanation:

b.an increase in a causes b to decrease