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Smart Reasoning:

C&E

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Qaagi - Book of Why

Causes

Effects

the skin of the eyelid being too loose(passive) is caused byInvolutional ectropion

a shortage of skin on the eyelid(passive) is caused byCicatricial ectropion

Eye drop instillation with chronic eversion of the lower lidcan leadto involutional ectropion

The most common anatomic changesleadingto involutional ectropion

increased horizontal laxity of the lower eyelid(passive) is caused byInvolutional ectropion

shortening of the muscles around the eye(passive) is caused byCicatricial ectropion

horizontal eyelid laxity of the medial and/or lateral canthal tendons(passive) is caused byInvolutional ectropion

The quotecausesaberrant ectropion

The decimalcausesaberrant ectropion

due to horizontal laxity of the eyelid(passive) is causedInvolutional ectropion

scarring and shortening of the anterior lamella of the lower eyelid skin , which may also occur with aggressive lower eyelid blepharoplasty(passive) may be caused byCicatricial ectropion

shortening of the anterior lamella or skin of the orbicularis oculi muscle from actinic skin changes , resection of skin lesions , trauma , burns , toxic reactions to topical eye medications , skin diseases , and aggressive blepharoplasty.[23(passive) can be caused byCicatricial ectropion

in ocular exposureresultingin ocular exposure

exposure keratoconjunctivitis and rarely corneal perforationmay causeexposure keratoconjunctivitis and rarely corneal perforation

in exposure keratopathy and eventually corneal scarringresultsin exposure keratopathy and eventually corneal scarring

if too aggressivecan resultif too aggressive

from previous ablative surgeryresultingfrom previous ablative surgery

from removal of eyelid tissue during an initial eyelid laceration repairresultingfrom removal of eyelid tissue during an initial eyelid laceration repair

from skin shortage and/or scarring , e.g.may resultfrom skin shortage and/or scarring , e.g.

the lower eyelid to turn outward , which reveals too much of the eye and tissue within , leading to burning , excessive tear production , and red eyecausesthe lower eyelid to turn outward , which reveals too much of the eye and tissue within , leading to burning , excessive tear production , and red eye

in corneal scar and blindness in the affected eye [ 7–9resultingin corneal scar and blindness in the affected eye [ 7–9

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Smart Reasoning:

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