Inflammatory eyelid conditions 

This is a short overview on inflammatory conditions that affect the eyelid.
Presentation was created using Google Slides.
Graphics were created or adapted from Wikimedia Commons.
ADDITIONAL TAGS:
Blepharitis
Chalazion
Hordeolum (stye)
Dacryocystitis
Etiology / pathophys:
Inflammation of base of eyelids (eyelid margin)
Granulomatous inflammation of blocked Meibomian (oil) gland
Infection of sebaceous glands at base of eyelashes
External: local infxn of Zeis gland
Internal: focal infxn of Meibomian gland
Infxn of nasolacrimal sac
(d below), usually acute
Signs / symptoms:
swelling, erythema, scaling of the lid margin
crusting on eyelashes
Nonpainful solitary rubbery nodule deep to eyelid margin; commonly on upper eyelid
Painful, erythematous nodule or pustule at the lid margin (external) or internal surface of eyelid (internal)
Painful swelling and erythema around medial canthal region, +/- purulent discharge
Inflammatory eyelid conditions
By Andre Riemann - Own work, Public Domain, commons.wikime...
By Imrankabirhossain - Own work, CC BY-SA 4.0, commons.wikime...
By Since FML's vector image was broken, Erin_Silversmith took the bitmap version and vectorised it. The labels in Portuguese were replaced with letters, for internationalisation purposes.(The iris was redone in the second revision of this image, based on the photograph Image:Iris.eye.225px.jpg (automatically vectorised using Delineate). However, in the fifth revision, this was then replaced by a spoke-like design based on the original GIF.)To the right, there is an example of how the diagram can be used in an article.Note how the diagram is neat, and the labels can be Wikilinks.If a version with labels in a certain language is deemed necessary, it should be uploaded with the language suffix i.e. Tear system xx.svg where xx is the language code. - Based on excellent images created by User:FML and uploaded to Commons as Sistema lacrimal.gif and Sistema lacrimal.svg., CC BY-SA 2.5, commons.wikime...
By Michal Klajban - Own work, CC BY-SA 3.0, commons.wikime...
By Jordan M. Graff, MD - webeye.ophth.ui..., CC BY-SA 3.0, commons.wikime...
By clubtable - Self-photographed, Public Domain, commons.wikime...
By Imrankabirhossain - Own work, CC BY-SA 4.0, commons.wikime...
also see periorbital/preseptal cellulitis
vs orbital cellulitis