Eyelids protect your eyes from any foreign bodies while keeping them lubricated throughout. Any alteration in the shape, position or function of your eyelids can predispose your eyes to a plethora of ailments or interfere with our vision.
Our eyelid is a complex structure consisting of three theoretical layers:
Contains the skin and orbicularis muscle
Contains the orbital septum and eyelid retractors
Contains tarsus and conjunctiva.
Any unnatural or incorrect positioning and orientation of eyelids due to various factors that influence any of the three layers of the eyelids. They may possibly be caused due to ageing, trauma, scarring, birth defects or medical disease involving any or all of the three layers.
The most common forms of eyelid malposition are:
Types of Eyelid Malpositions
Upper eyelid malpositions:
Upper lid ptosis (drooping down of upper eyelid), retraction of the upper eyelid (causing apparently bulging eyes), entropion(in-turning of eyelid and lash line) and ectroprion (out-turning of the eyelid).
Lower eyelid malpositions
Retraction of lower eyelid (lid margin below inferior limbus), entroprion (inward rotation of the eyelid margin) and ectroprion (outward rotation of the eyelid margin).