Question

To prevent eye medications from getting into the systemic circulation you apply pressure to the _______ for ______ seconds.

a) Sclera, 10 seconds
b) Inner canthus, 30 seconds
c) Outer canthus, 15 seconds
d) Cornea, 5 seconds

Answer 1

To prevent systemic absorption of eye medications, apply pressure to the inner canthus for 30 seconds. A force of 0.300 N exerted on the cornea area of 1.10 cm² equates to an intraocular pressure of 20.5 mm Hg, within the normal range.

Step-by-step explanation:

To prevent eye medications from entering the systemic circulation, you should apply pressure to the inner canthus, for 30 seconds. This is recommended after instilling eye drops to reduce the risk of systemic absorption through the nasolacrimal duct.

In the context of eye health and pressure, it's important to note that the aqueous humor in a person's eye can exert pressure on the cornea. If the aqueous humor in a person's eye is exerting a force of 0.300 N on the 1.10-cm² area of the cornea, the resulting pressure is 20.5 mm Hg, which is within the normal range for pressures in the eye (12-24 mm Hg). An abnormal increase in intraocular pressure can lead to glaucoma, which is a condition that can damage the optic nerve and result in vision loss.