The ________ of the eye works similarly to the shutter of a camera.

The ________ of the eye works similarly to the shutter of a camera.
 
  A) lens
  B) iris
  C) eyelid
  D) cornea

Question 2

All of the following are indications for intravenous access EXCEPT:
 
  A) drug administration.
  B) obtaining venous blood specimens.
  C) fluid and blood replacement.
  D) allergy testing.

Question 3

A patient who was hit in the face with a cloud of dust while working in an industrial setting is complaining of pain and discomfort to his left eye. While performing your secondary assessment on the eye, you note some redness to the globe but do not see any obvious foreign object. The most appropriate care you can provide to this patient would be:
 
  A) gently massaging the eye to promote tearing.
  B) having the patient hold the eye open during transport.
  C) carefully wiping the eye with a soft piece of sterile gauze.
  D) covering both eyes with a bandage.