Surgical Eye Diseases

Question 1

What is the causative agent for pink eye in cattle?

Answer 1

Moraxella bovis

Question 2

The image below shows a __________ antibiotic injection for treatment of Moraxella bovis

Answer 2

transpalpebral subconjunctival

Question 3

The most common tumor in cattle is:

Answer 3

Squamous cell carcinoma

Most common tumor in cattle, occurs throughout the world, affects mostly older cattle

Question 4

Bovine ocular squamous cell carcinoma is commonly referred to as:

Answer 4

Cancer eye

Question 5

Squamous cell carcinoma is heritable in what cattle breed?

Answer 5

Hereford​

Question 6

What procedure is being performed here?

Answer 6

Superficial keratectomy​

Question 7

When using hyperthermia as a treatment for small circumscribed tumors, you must reach a temperature of _____ for _____ seconds to kill tumor cells

Answer 7

When using hyperthermia as a treatment for small circumscribed tumors, you must reach a temperature of 50˚C for 30 seconds to kill tumor cells

Question 8

What procedure is being performed here?

Answer 8

Radiofrequency hyperthermia​

Question 9

In order to use cryosurgery as an effective tumor treatment, the tumor must be less than _____ mm

Answer 9

50 mm (aka 5cm)

• Best is a double freeze/thaw cycle
• Freeze at -25˚C
• Freeze 0.2 – 0,4 cm of normal tissue around the tumor

Question 10

Removal of the entire orbital content is called:

Answer 10

Exenteration​

Question 11

A Peterson block blocks the __________ nerve

Answer 11

Optic​

Question 12

What two local blocks are commonly used to block the optic nerve?

Answer 12

Peterson and Retrobulbar​