Using the CPT manual, select the appropriate code for the following procedure

________ molecules are the most abundant gas molecules in the air we breathe

A) Hydrogen B) Carbon dioxide C) Oxygen D) None of the above

Which of the following statements is most correct when describing the use of an ophthalmoscope?

a. The examiner should close both eyes while examining the patient's eye. b. The examiner should never examine the patient's eye. c. The examiner should use his or her corresponding eye to examine the patient's eye. d. The examiner should use his or her opposing eye to examine the patient's eye.