Card Set Information

2012-10-03 21:24:16
DPA TPA optometry drugs

Show Answers:

  1. 2 names of drugs?
    • generic name
    • registered trade names
  2. Solution methods of administration?
    • multidose- 4-6 weeks, preservatives, cost effective, allergies, contamination
    • minims- single dose, no preservatives, no contamination, no allergies
  3. Impregnated paper strip method of administration?
    • activated with soln
    • used once+discarded
    • eliminates cross contam
    • cost effective
    • no preservatives
  4. Ointment method of administration
    • oily base-sticks to cornea
    • cant see
  5. Adverse reactions to drugs?
    • side effects
    • allergic reaction
    • idiosyncratic reaction
    • contraindication
    • drug interaction
  6. Px factors when administering drugs?
    • age- dose differences
    • iris colour- add more in pigmented 
    • health- 
    • psych- 
  7. mydriasis is controlled by which part of the ANS
  8. Miosis is controlled by which part of the ANS?
  9. What do topical anaesthetics do?
    • applied to eye to produce reversilbe blockage of the corneal  and conjunctival sensory nerves
    • increases corneal permeability- enhances transport of subsequently applied drugs through cornea- loosens tight junctions
    • loss of corneal blink reflex- corneal trauma
  10. When can you NOT use topical anesthetics on the eye?
    • corneal damage
    • allergy 
    • hypersensitivity
    • emotional instability
  11. Where should the topical anesthetic be applied on the eye?
    • lower palpebral sac
    • NOT cornea- may enhance toxic reaction
  12. What are the 2 classes of drugs that cause mydriais?
    • Parasymptholytics
    • sympathomimetics
  13. What do parasympolytic drugs do to the eye"?
    • antagonisitic action on muscarinic receptors on
    • sphincter papillae and ciliary muscle
    • causes both mydriasis and cyclo
  14. What do sympathomimetic drugs do to the eye?
    • stimulates dilator papillae muscle
    • causes mydriasis without cyclo
  15. Contraindications of mydriatic drugs?
    • IOLs
    • driving
    • narrow angle
    • previous 4
    • pupil block
  16. What are some adverse reactions of mydriatics?
    • photophobia
    • stinging
    • syncope
    • systemic side effects
    • blurred vision
    • angle closure glaucoma
  17. What percentage dose of mydriacyl is used in blue/brown eyes and max dilation?
    • 0.5%
    • 1.0%
    • 1.0%+2.5% phenylephrine
  18. What are the uses of miotics?
    • eye constriction
    • closed angle glaucoma attack
    • reverse cyclopegics
    • may cause transient myopia-ciliary spasm
  19. How does fluoroscein work?
    • stains tight junctions
    • poor lipid solubility- does not penetrate intact cell membranes
  20. How does a cobalt blue filtered light work to show staining?
    fluoroscein dye absorbs energy frmo visible light at a lower wavelength and re-emits it at a higher wavelength
  21. What are the uses of fluoroscein strips?
    • Tonometry
    • Assessing the integrity of the cornea/anterior eye
    • Diagnosis of dry-eye
    • Ritting RGP contact lenses
  22. How does rose bengal staining work?
    • stains degenerate cells and their nuclei
    • will hence locate damages and devitalised cells in the cornea and conjunctiva.
  23. What are the uses of rose bengal staining?
    • used for the diagnosis of dry eye
    • will cuase a little stinging when applied