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NCLE study guide

OPTIX study guide

QuestionAnswer
What is the radius of curvature of the central posterior surface of the lens? Base Curve
Expressed diopters of surface power 42.75D
mm of radius of curvature 7.90 mm
T/F.... Base curve has both a radius of curvature and a diameter True
Diameter of the base curve is referred to as Optical Zone
Lies between the base curve and peripheral curve Secondary curve/Intermediate curve
First line of defense in eyeball protection Lashes
Modified cilia Lashes
Located on lid margin Lashes
Sensitive to touch "warning when something approaches the eye and causes to close" Lashes
Important in lubrication due to surrounding sebaceous glands Lashes
Inflammation of lid margin Blepharitis
Dandruf like flakes, itching, swelling, & redness Blepharitis
T/F....Blepharitis is a chronic condition True
Inward turning eyelash Trichiasis
Most visable outer structure of the eye Eyelids
Palpebrae Eyelids
Controls the amount of light to enter the eye Eyelids
Distributes tears across outer surface Eyelids
Multilayerd organ Eyelids
Outermost layer of the eyelids skin
Muscle responsible for lid closure Orbicularis oculi
Densest layer orbital suptum, muscles & tarsal plate
Tissue that separates the fat in the boney orbit from the lid Orbital septum
Raises upper lid Levator palpebrae seperioris
Lowers lid Contractor muscle
Maintains shape of lids muscle of Muller
Runs the length of lids; provides structure and houses meibomian gland Tarsal plate
Clear mucus membrane that covers entire inner layers of lid and upper portion of sclera Palbebrae conjunctiva
What is the average size of the opening between lids & palpebrae fissure? 10 mm wide & 30 mm long
Where the two lids meet canthi
Surrounds a hill of skin called caruncle Nasal canthus/medial canthus/inner canthus
Contains sweat and subaceous glands Caruncle
Created by: Mistyvest
 

 



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