CPO FREE CPO Ocular Pharmacology and Medication Instillation Questions and Answers 2

Question 1

A patient taking a systemic medication for a heart arrhythmia, amiodarone, presents with complaints of seeing colored halos around lights. Which ocular structure is most likely affected by deposits from this medication?

Accepted Answer

Cornea

Answer

Amiodarone is well-known to cause corneal verticillata, which are whorl-like deposits on the cornea. These deposits can lead to symptoms like seeing halos around lights. While amiodarone can also cause optic neuropathy, the symptom of halos is classically associated with the corneal changes.

Question 2

A 6-year-old child requires a cycloplegic refraction. The optometrist wants to use an agent with a strong effect but a shorter duration of action than atropine to minimize inconvenience for the child and parents. Which agent is the most appropriate choice?

Accepted Answer

Cyclopentolate

Answer

Cyclopentolate is a potent cycloplegic agent commonly used for refractions in children. Its onset is rapid, and its duration of action (6-24 hours) is significantly shorter than atropine (7-12 days), making it a practical choice for routine clinical use. Tropicamide provides weaker cycloplegia, and phenylephrine is a mydriatic with no cycloplegic effect.

Question 3

A patient with severe glaucoma is prescribed a beta-blocker ophthalmic solution. To minimize the potential for systemic side effects like bradycardia, which instruction is most critical for the paraoptometric to provide?

Accepted Answer

"Apply gentle pressure to the corner of the eye near the nose for 30-60 seconds after instillation."

Answer

Applying gentle pressure over the inner canthus performs punctal occlusion, which prevents the medication from entering the nasolacrimal duct and being absorbed systemically. This technique maximizes the drug's local effect on the eye while minimizing systemic absorption and potential side effects like slowed heart rate (bradycardia).

Question 4

A clinic uses multi-dose bottles of dilating drops for multiple patients. Which of the following actions represents a critical breach of aseptic technique that requires the bottle to be discarded or dedicated to a single patient?

Accepted Answer

The tip of the dropper bottle makes brief contact with the patient's lower eyelashes.

Answer

Any contact between the tip of a multi-dose dropper bottle and a patient's eye, lids, or lashes contaminates the bottle. Once contaminated, the bottle must not be used on other patients to prevent cross-contamination and potential infection. It should either be discarded or used only for that specific patient.

Question 5

A patient with severe allergic conjunctivitis has not found relief with over-the-counter antihistamine drops. The ophthalmologist prescribes a short-term course of a topical corticosteroid. Which potential adverse effect is most important to monitor for with this class of medication?

Accepted Answer

Increased intraocular pressure

Answer

Topical corticosteroids are potent anti-inflammatory agents, but their use can lead to serious side effects. One of the most significant is an increase in intraocular pressure (IOP), which can lead to glaucoma if not monitored and managed. Long-term use also carries risks of cataract formation and increased susceptibility to infection.

(CPO) Certified Paraoptometric Practice Test

(CPO) Certified Paraoptometric Practice Test

CPO FREE CPO Ocular Pharmacology and Medication Instillation Questions and Answers 2