Ophthalmic Preparations and Osmolality
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Questions and Answers

Which of the following can help prevent irritation and improve effectiveness of ophthalmic preparations?

  • Using hypertonic solutions
  • Matching the properties of natural lacrimal fluids (correct)
  • Using solutions with high sodium chloride concentration
  • Using hypotonic solutions

What is the role of osmotic pressure in the eye?

  • Improving the effectiveness of ophthalmic solutions
  • Dehydrating the cornea
  • Causing corneal edema
  • Regulating the salt concentration in lacrimal fluids (correct)

Which type of solution can lead to water influx and corneal edema?

  • Hypertonic solutions
  • Isotonic solutions
  • Hypotonic solutions (correct)
  • Solutions with high sodium chloride concentration

What is the recommended sodium chloride concentration in ophthalmic solutions?

<p>0.6% to 1.3% (C)</p> Signup and view all the answers

Which substance can be used as a tonicity agent in ophthalmic solutions?

<p>Sodium chloride (D)</p> Signup and view all the answers

Which of the following solvents is commonly used in otic solutions?

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

What is the purpose of using polymers in aqueous solutions?

<p>To increase viscosity (B)</p> Signup and view all the answers

Why are nonaqueous solutions preferred for earwax removal?

<p>They dissolve earwax more effectively (B)</p> Signup and view all the answers

Do otic solutions need to be isotonic?

<p>No, they don't need to be isotonic (B)</p> Signup and view all the answers

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