A physician that provides medical and surgical care on the eye is an:

A young male playing hockey on an ice-covered pond has been injured and remains on the ice. As you arrive on scene, a park ranger informs you that the ice is 12 inches thick and poses no danger of collapse. In this situation, which one of the following actions would be most appropriate?

A) Have a teammate assist the injured player to your location. B) Apply salt to the ice to provide traction. C) Place tarps on the ice to walk over to the injured player. D) Take small slow steps to the patient's location.

Which of the following is a common method to measure aerosol particle size?

a. Scan b. Gravimetric c. Cascade impaction d. Penetration studies