Final Exam - Ophthalmic Exam Flashcards
what ocular lesion is seen in this photo?
rubeosis iridis - engorged iris radial arterioles & new blood vessels with uveitis
this dog has hypertriglyceridemia - what is seen on its ocular lesion?
pale, fat-laden vessels
this dog has vasculitis - what is seen on its ocular exam?
retinal vessel damage causing hemorrhage
what ocular lesion is shown? what part of the eyes are you evaluating?
optic neuritis - looking at the CNS
T/F: ocular manifestations of systemic disease are common in veterinary medicine
TRUE
what lesion is shown in this photo as a result of stomatitis?
pseudobuphthalmos
what ocular lesion is shown in this dog that is occurring secondary to diabetes mellitus?
equatorial vacuoles in the lens
what may be seen on ocular exam that supports anemia in a cat?
thin, pale vessels
what does OMSD mean?
ocular manifestations of systemic disease
why do owners often readily recognize ocular disease in their pets?
eye contact is a significant factor in the human-animal bond, so they are quick to notice changes
what is the most important component of a successful ophthalmic exam when you’re trying to exam/image the globe & its associated structures?
room lights off!!!!!!!
what is the most important tool needed for an ophthalmic exam?
controlled light source in a dark environment
what components make up the tools required for a successful ophthalmic exam?
controlled light source in a dark environment, means of dilating the pupil/performing fundoscopy, means of achieving magnification, means of discerning depth, & minimum database resources for STT, fluorescein stain, & tonometry
why is an incandescent pen light not a great light source for an ophthalmic exam?
it is too dim
why is an LED flashlight from an iPhone not a great light source for an ophthalmic exam?
it is too bright by itself
what are your appropriate light source choices for an ophthalmic exam?
halogen lights - finoff transilluminator & otoscope
what challenges are presented when trying to perform an ophthalmic exam in a well lit environment?
creation of specular reflections that obscure/prevent/confuse your intraocular exam
what should you do with the lights when you’re examining/imaging the head/orbit/eyelids?
room lights on!!!!
what is the benefit of using a dark environment for an ophthalmic exam?
removing environmental light allows the examiner to use imposed light to highlight specific aspects of the eye when subtley changing light to highlight iris topography & lens opacities
_____ ______, or mydriasis, facilitates fundoscopy
pupil dilation
what is the time of onset for tropicamide? How long does it last?
15-20 minutes for onset & it lasts 2-4 hours
what is the purpose of using tropicamide?
dilating the pupil
what is the orientation provided when using the indirect fundoscopy technique?
it is upside down & backwards
what is the preferred technique used for performing fundoscopy?
indirect using a light source & macro lens