11 The Eyelids Flashcards
The upper eyelid is _______ and more mobile than the lower. Can be raised 15mm by the levator.
The lower lid usually lies within _mm of the ________ limbus
LARGER
1mm. Inferior
The two eyelids are separated by a small triangular space called the _______ __________. In the center of this, is a small pinkish elevation called the __________ __________. A semilunar fold called the _______ semilunaris lies on the lateral side of caruncle
Locus lacrimalis
Caruncula lacrimalis
Plica
The eyelids function to:
1) cover the globe for _____________
2) move tears toward drainage at the ________ canthus on closure
3) spread the tear film over the ________ surface of the eye upon opening.
4) contain structures that produce _____ ______
Protection
Medial
Anterior
Tear film
Which layer of the eyelid is thinnest and contains no fat?
Which layer is a muscle of facial expression innervated by CN VII?
What portion of this layer is used for forced closure of the eyelids? What portion is used for spontaneous and reflex blinking (divides into muscle of Riolan and muscle of Horner)?
Skin layer!
Orbicularis layer
Orbital portion. Palpebral portion!
The muscle of ______. Is the superficial orbicularis oculi that keeps the lid margin __________. Applied to the globe during eye movements.
What line divides the lid into anterior and posterior portions and used as a surgical landmark?
Riolan. TIGHTLY
Gray line.
The muscle of ________ consists of fibers from the orbicularis that encircle canaliculi and help drain tears into lacrimal sac!
HORNER
What eyelid layer is a dense irregular layer of loose CT that serves as a ________ to the orbit in the uppper and lower lids. What’s the only thing it doesn’t protect?
Everything in front of this is considered ___ ______or anterior and anything behind is ______ ______
BARRIER.
Lacrimal sac is NOT protected
Pre-ceptal . Post-ceptal
What’s the main retractor muscle of the upper eyelid?
Where does it originate?
What ligament (also called Whitnall’s ligament) allows for change in course of muscle from anterior/posterior to superior/inferior?
Superior palpebral levator muscle
Lesser wing of sphenoid
Superior transverse ligament
The muscle of _____ is smooth muscle that’s innervated by sympathetic nervous system. (Unique)
Originates on the ________ and extends into tarsal plate.
Very minor _________ of the eyelid- ______ the palpebral fissure.
The ________ tarsal muscle is also innervated by SNS and provides minor lower lid __________
Muller!
Levator
Retractor. WIDENS
Inferior. Retraction (VERY MINOR)
The tarsal plate contains ___________ glands that are LARGE sebaceous glands that are located posterior to eyelash follicles within tarsal plate.
Each consist of 10-15 acini attached to large central duct. Produce anterior lipid layer of tear film
Meibomian
The _____________ conjunctiva is the inner lining of the eyelids that contains two layers.
The epithelial layer which is a protective layer that contains ______ cells that produce mucin layer of tear film!
2nd is the ______ with a superficial lymphoid layer and a deep fibrous layer
Palpebral.
GOBLET
Stroma
The ____ glands are composed of just one or two acini and are associated with the eyelash follicle. 1-2 per follicle. Lubricate eyelashes to prevent them from becoming brittle
Zeis
The ____ glands are modified apocrine glands which are located near eyelash follicle. Empty their contents onto eyelash follicles, Zeis glands, and lid margin
MOLL
The glands of ______ are accessory lacrimal glands that are located in the cornices.
The glands of _______ are accessory lacrimal glands that are larger than the glands of _______. Located in tarsal conjunctiva.
Krause (KRAUSE in the CREASES)
Wolfring
