FREE CPO Ocular Pharmacology and Medication Instillation Questions and Answers

Question 1

Which type of ophthalmic medication is used to dilate the pupil?

Accepted Answer

Mydriatics

Answer

Mydriatics are a class of drugs that cause the pupil to dilate (mydriasis). They are commonly used for fundus examinations to get a better view of the retina. Miotics, in contrast, constrict the pupil.

Question 2

When instilling eye drops, where should the drop be placed to minimize systemic absorption and maximize ocular contact?

Accepted Answer

In the lower cul-de-sac

Answer

Instilling the drop into the lower cul-de-sac (the pocket formed by gently pulling down the lower eyelid) allows the medication to pool and be absorbed by the eye's surface tissues. Placing it directly on the sensitive cornea can cause excessive blinking and tearing, leading to loss of the drop.

Question 3

In addition to dilating the pupil, what is the primary function of a cycloplegic agent like cyclopentolate?

Accepted Answer

To temporarily paralyze the ciliary muscle

Answer

Cycloplegic agents paralyze the ciliary muscle, which controls accommodation (the eye's ability to focus). This is crucial for obtaining an accurate refractive measurement (refraction), especially in children and young adults.

Question 4

An ophthalmic medication bottle with a red cap typically indicates which class of drug?

Accepted Answer

Mydriatics and Cycloplegics

Answer

The pharmaceutical industry uses a standardized color-coding system for ophthalmic medication caps to prevent errors. Red caps signify mydriatics and cycloplegics, which can be dangerous if used incorrectly, such as in a patient with a narrow anterior chamber angle.

Question 5

What is the primary purpose of applying punctal occlusion after instilling eye drops?

Accepted Answer

To reduce systemic absorption of the medication

Answer

Punctal occlusion involves gently pressing on the inner corner of the eye to block the tear ducts (puncta). This keeps the medication in contact with the eye longer and prevents it from draining into the nasal cavity and being absorbed into the bloodstream, which reduces potential systemic side effects.

(CPO) Certified Paraoptometric Practice Test

(CPO) Certified Paraoptometric Practice Test

FREE CPO Ocular Pharmacology and Medication Instillation Questions and Answers