CAL: The Red Eye Flashcards
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Eyelid redness is caused by…
Periocular tissue becoming red- this includes the skin, muscles, conjunctiva and the Meibomian glands
Give two lesions that may cause Periocular (eyelid) redness
Periocular dermatitis
Infected Meibomian glands
What other structures can eyelid redness affect?
Cornea & Tear Film- think inflammation can cause abnormal contact on the ocular surface
In the third eyelid, what structures can become red and how?
Cartilage- can curl and fold
Lymphoid tissue- associated with hyperaemia
Accessory lacrimal glands- can prolapse and become inflamed
What structures can become red in the conjunctiva?
mucous membrane that lines the eyelids and the sclera
Conjunctival Hyperaemia is associated with…
Ocular surface disease
Episcleral Hyperaemia is associated with
Deep ocular tissue disease
What is Superficial Corneal Neovascularisation?
Formation and extension of new vascular capillaries within an avascular corneal region e.g. vessels in the iris
Superficial Corneal Neovascularisation is a sign of…
Ocular surface disease (if corneal vascularisation is deeper ie it looks like a hedge around the iris its a sign of deeper ocular disease including intraocular)
Give two examples of an ocular surface disease where superficial corneal neovascularisation is symptom?
Ulcerative Keratitis
Keratoconjunctivitis Sicca (aka dry eye)
Give two examples of a deep ocular disease where superficial corneal neovascularisation is a presenting sign?
Uveitis - also shows signs of Miosis and low IOP
Glaucoma- shows signs of Mydriasis and high IOP
What is Hyphema?
Blood in the anterior chamber
What is the name for when
a. white blood cells
b. protein
c. fibrin
are found in the anterior chamber?
WBCs- hypopion
Protein- aqueous flare
Fibrin- fibrinous uveitis
What are the anatomical limits of the anterior chamber?
Cornea
Iris
Iridocorneal Angle (where the outflow of aqueous humour from the anterior chamber of the eye)
