5 Flashcards
Eyelids are lined on the inside with
Conjunctiva
What muscle closes the eyelid
Orbicularis oculi m
The orbicularis oculi m is innervated by
CN 7
What muscle open the eyelid
Levator palbepbrae m
Levator palbepbrae m is innervated by
CN 3
Ankyloblepharon
Fusion of the upper and lower eyelids
Ankyloblepharon is normal in what time of life
First 10 - 15 days
If the eyelids open prematurely
The cornea may dry up
Eyelids close from
Lateral to medial to spread tears and direct them into the nasolacrimal punctuated
The eyelids blocks % of light
90%
Distichia
Cilia originating from the tarsal gland , emanating from tarsal gland opening on eyelid margin
Distichia is seen often in
Cockers, dachshaunds and poodles
How do you treat Distichia
Freeze with a double freeze thaw cycle with liquid or nitrous oxide
Most Distichia are
Asymptomatic
Trichiasis
Normal hair that rubs the cornea often seen with prominent facial folds or aberrant dermis
How do you treat trichiasis
Train hair away with petroleum jelly, pocket medial canthoplasty or facial fold resection
Ectropion
Version of eyelid
Ectropion seen in
Bloodhound, basset, cockers, st Bernard’s
Signs of Ectropion
Eyelid, chronic conjuctivitis, ocular discharge
Medical treatment of Ectropion
Topical steroid
Surgical treatment of Ectropion
Modified Kuhnt - Symanowski procedure
Pagoda Lid
Combo of Ectropion and Ectropion
Clinical signs of pagoda lid
Ectropion laterally and medially with central Ectropion
Lagopthalmia
Failure to blink
Lagophthalmia due to
Facial nerve paralysis - Brachiocephalics
What are the orbits like when lagopthalmia
Shallow and eyeball protrude anterioly
Treatment of lagopthalmia
Medial canthoplasty
Medial canthoplasty
Shorten the palbepbrae fissure, superior and inferior leds are sutured together to shorten the palbepbrae fissure each block covers more cornea
Medial aberrant dermis
Small breeds often have a small piece of dermis in the medial canthus of the eye and hairs emanate from this piece of fermi’s
Treatment of medial aberrant dermis
Medial canthoplasty
Ophthalmia neonatorum
Infection under fused lids prior to the lines opening
Ophthalmia neonatorum is usually due to
Staphylococcus
Ophthalmia neonatorum seen in
Pup or kitten older than 14 days
How do you treat ophthalmia neonatorum
Split lid margin carefull with blunt scissors and teh conjunctiva is flushed - treat w AB based on culture
2 types of eyelid masses
Chalazion and neoplasia
Chalazion
Granulomatous inflammation of the tarsal glands beneath teh conjuctivial surface
Neoplasia
Tarsal gland adenomas
Most common neoplasia is
Adenoma arising from the meibomian glands
What is the main problem induced by benign tumors
Get large enough to interefere with lid function, induce keratitis, and conjuctivial from rubbing on the ocular surface
Only way to DX neoplasia
Biopsy
What fraction of the eyelid margin can be removed without decreasing function
1/ 3
If greater than 1/2 of eyelid margin needs to be removed what procedure is done
Blepharoplastic procedure
For small tumors what procedure is done
Wedge resection or pentagonal excision
Many neoplasia are now treated with
Debunk and cryo
Immediate repair of eyelid lacerations are necessity to prevent
Tissue loss
When repairing eyelid laceration swhat needs to be placed first
Figure 8
What type of closure is needed for long lacerations
Two layer
