KVV E-Modules

1. Which of the following is NOT a structural layer of the eyeball?

A: Fibrous layer B: Vascular layer C: Neural layer D: Conjunctival layer

2. What is the primary barrier for drug absorption in the cornea?

A: Hydrophilic stroma B: Lipophilic epithelium C: Blood-retinal barrier D: Tear film

Which ophthalmic preparation is most likely to cause blurred vision after application?

A: Eye drops B: Eye gels C: Eye ointments D: Intravitreal injections

3. Which ophthalmic preparation is most likely to cause blurred vision after application?

A: Eye drops B: Eye gels C: Eye ointments D: Intravitreal injections

4. What is the purpose of the lacrimal puncta in the eye?

A: To produce tears B: To drain excess tears into the nasal cavity C: To focus light onto the retina D: To control the shape of the lens

5. Which of the following ophthalmic preparations provides the longest drug retention time?

A: Eye drops B: Eye sprays C: Ocular implants D: Eye gels

6. Why are preservatives like Benzalkonium chloride added to ophthalmic preparations?

A: To increase drug solubility B: To enhance drug penetration C: To prevent microbial growth in multi-dose formulations D: To maintain isotonicity

7. Which structure in the eye produces aqueous humour?

A: Iris B: Ciliary body C: Retina D: Cornea

8. What is the primary advantage of contact lens-based drug delivery systems?

A: Non-invasive administration B: Prolonged and controlled drug release C: Reduced manufacturing cost D: Immediate systemic absorption

9. Which of the following is a challenge in developing ophthalmic preparations?

A: High tear turnover rate B: Lack of drug solubility C: Inadequate sterility testing methods D: Overproduction of aqueous humour

10. What is the ideal pH range for ophthalmic preparations to match tear fluid?

A: 6.0 – 6.5 B: 7.0 – 7.4 C: 8.0 – 8.5 D: 5.5 – 6.0