β Adrenergic Blockers in Ophthalmology

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson
Download our mobile app to listen on the go
Get App

Questions and Answers

Which of the following is NOT affected by topical β blockers?

  • Intraocular pressure (i.o.t.)
  • Pupil size (correct)
  • Tone of ciliary muscle
  • Outflow facility

Why are ocular β blockers designed to be lipophilic?

  • To increase aqueous formation
  • To avoid corneal hypoesthesia
  • To reduce systemic effects (correct)
  • To increase systemic effects

What is the likely mechanism behind the reduction in ocular blood flow by β blockers?

  • Blockade of β2 receptors in the ciliary epithelium (correct)
  • Activation of adenylylcyclase
  • Upregulation of β2 receptors
  • Increased aqueous formation

What is a common systemic adverse effect associated with ocular β blockers?

<p>Bronchospasm in asthmatic patients (B)</p> Signup and view all the answers

How can systemic adverse effects of ocular β blockers be minimized?

<p>Applying pressure on the inner canthus of the eye (B)</p> Signup and view all the answers

What ocular side effect is generally mild and infrequent with β blockers?

<p>Corneal hypoesthesia (D)</p> Signup and view all the answers

What is the primary mechanism by which β blockers lower intraocular pressure (i.o.t.)?

<p>Reducing aqueous formation (D)</p> Signup and view all the answers

Why are ocular β blockers preferred over miotics in current practice?

<p>They cause less ocular side effects (C)</p> Signup and view all the answers

What is a distinguishing characteristic of ocular β blockers that helps reduce systemic effects?

<p>High ocular capture (D)</p> Signup and view all the answers

Which of the following systemic adverse effects is commonly associated with ocular β blockers?

<p>Bradycardia (C)</p> Signup and view all the answers

How do systemic adverse effects occur in patients using ocular β blockers?

<p>Absorption through the nasolacrimal duct (D)</p> Signup and view all the answers

Which population is at higher risk for experiencing life-threatening bronchospasm when using ocular β blockers?

<p>Elderly individuals (A)</p> Signup and view all the answers

Flashcards

Topical β Blockers: Pupil Size Effect?

Pupil size is not directly affected by topical β blockers.

Ocular β Blockers: Lipophilicity Benefit?

Lipophilic design reduces systemic effects of ocular β blockers.

β Blockers: Ocular Blood Flow Mechanism?

Reduction in ocular blood flow is likely due to blockade of β2 receptors in the ciliary epithelium.

Ocular β Blockers: Common Systemic Effect?

Bronchospasm in asthmatic patients is a common systemic adverse effect.

Signup and view all the flashcards

Ocular β Blockers: Minimizing Systemic Effects?

Apply pressure on the inner canthus of the eye to minimize systemic effects.

Signup and view all the flashcards

β Blockers: Infrequent Ocular Side Effect?

Corneal hypoesthesia is a generally mild and infrequent ocular side effect.

Signup and view all the flashcards

β Blockers: IOP Lowering Mechanism?

Primary mechanism is reducing aqueous formation.

Signup and view all the flashcards

β Blockers vs. Miotics: Preference Reason?

Ocular β blockers cause less ocular side effects.

Signup and view all the flashcards

Ocular β Blockers: Distinguishing Characteristic?

High ocular capture helps reduce systemic effects.

Signup and view all the flashcards

Ocular β Blockers: Common Systemic Side Effect?

Bradycardia (slowed heart rate) is commonly associated.

Signup and view all the flashcards

Ocular β Blockers: Systemic Adverse Effect Route?

Absorption through the nasolacrimal duct.

Signup and view all the flashcards

Ocular β Blockers: High-Risk Population?

Elderly individuals.

Signup and view all the flashcards

More Like This

Ophthalmology and ENT Terminology Quiz
10 questions
Ophthalmology and Health Basics Quiz
15 questions
Use Quizgecko on...
Browser
Browser