Tonometry is performed on a client with a suspected diagnosis of glaucoma. The nurse looks at the documented test results and notes an intraocular pressure (IOP) value of 23. What should be the nurse's initial action?

a) Apply normal saline drops.
b) Note the time of day the test was done.
c) Contact the health care provider (HCP).
d) Instruct the client to sleep with the head of the bed flat.