Ocular Anesthetics

Question 1

Indications of ocular Local Anesthetics:

Answer 1

1. Force duction test
2. ElectroRetinoGraphy (ERG)
3. Goldman applanation tonometry
4. Gonioscopy
5. Corneal epithelial debridement or Corneal scraping
6. Fundus-contact condensing lens examination
7. Foreign Body & Suture removal

Question 2

anesthesia used in Forced duction test:

Answer 2

cocaine or lidocaine

Question 3

anesthesia used in ElectroRetinoGraphy (ERG):

Answer 3

tetracaine

Question 4

anesthesia used in Goldman applanation tonometry:

Answer 4

proparacaine or benoxinate

Question 5

anesthesia used in Gonioscopy:

Answer 5

proparacaine or benoxinate

Question 6

anesthesia used in corneal epithelial debridement/corneal scraping:

Answer 6

cocaine or tetracaine

Question 7

anesthesia used in fundus-contact condensing lens examination

Answer 7

proparacaine

Question 8

anesthesia used in foreign body & suture removal

Answer 8

proparacaine

Question 9

Ocular side effects of topical anesthetics:

Answer 9

1. Mild stinging & burning sensation - most common
2. Conjunctival Vasodilation - red eyes
3. Shortening of TBUT
4. decrease reflex tearing
5. decrease blinking - DES
6. decrease epithelial mitosis & migration (delay corneal healing)
7. corneal edema - blurred vision
8. Punctuate epithelial keratitis
9. Epithelial desquamation
10. Allergy - at lids & conjunctiva