Shared Flashcard Set

Details

A3
Ophthalmic Exams
22
Veterinary Medicine
Professional
08/21/2016

Additional Veterinary Medicine Flashcards

 


 

Cards

Term
Which topical medications do we use to assist with opthalmic examination?>
Definition
-Proparacaine
-Tropicamide
Term
What are three common ophthalmic diagnostic tests?
Definition
-Shirmer tear test, Fluorescein staining, Tonometry
Term
What is the purpose of Proparacaine?
Definition
-topical anesthetic for conjunctiva and cornea
Term
What is proparacaine used for?
Definition
-cytology
-tonometry
-exam of the nictitans
-flushing the nasolacrimal duct
Term
Why do we only use proparacaine for diagnostics and not treatment?
Definition
-b/c toxic to the corneal epithelium with repeated use
Term
What is the purpose ot Tropicamide?
Definition
-topical mydriatic
Term
What are the indicaitons for tropicamide use?
Definition
-complete examination of the lens and fundus
Term
What are the contrindications for tropicamide use?
Definition
-glaucoma (exacerbates already high intraocular pressure)
-less instability
Term
What does the Schirmer tear test measure?
Definition
-tear production from the lacrimal glands
Term
Describe the afferent and efferent arms of tear production.
Definition
-Afferent: corneal sensation or irritations (CN V)
-Efferent: parasympathetic branches with CN VII stimulate lacrimal gland secretion
Term
When during the examination process do we perform a Schirmer tear test?
Definition
-BEFORE putting any drops in the eye
Term
How do we perform a Schirmer tear test?
Definition
-put diagnostic strip into lower space of eye and let it sit for 60 seconds then read as soon as it is removed
Term
What are the normal canine parameters for the Schirmer tear test?
Definition
- greater than or equal to 15mm/60 seconds
Term
What is Fluorescein stain
Definition
-bright orange dye that turns green and fluoresces in the tear film (seen best with blue light)
Term
Describe the fluorescein stain technique to diagnose a corneal ulcer.
Definition
-place stain in the eye => rinse with eye wash => view the room lights out with either white or blue light
-can be used full-strencth or diluted with eyewash in a syringe
Term
Describe the fluorescein stain techniqure used to test nasolacrimal system patency.
Definition
-place full-strencht in the eye and allow 3-5 mins to traverse through the nasolacrimal system
-simply stains the tear film allowing visualization of the path the tears take from the eye to the nose
Term
What is tonometry?
Definition
-measures intraocular pressure
Term
What is Applanation tonometry?
Definition
-measures how much pressure it takes to flatten (applanate) the cornea
Term
What is reboudn tonometry?
Definition
-measures the speed of probe return after impacting the cornea
Term
Describe how posititioning is considered with tonometry.
Definition
-stabilize hand
-no pressure on the eye: kiip finger placement on the dorsal and ventral orrbital rim
-no pressure around the neck: any compression of htejugular vein will increase pressure in the ipsilateral eye
Term
Where do we place the probe for tonometry?
Definition
-touch to the center of the cornea with the tonometer tip or probe perfectly perpendicular to the cornea
Term
What are the contraindications of tonometry?
Definition
-ruptured eye
-deep corneal ulcer or laceration
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