Diagnosis of Blepharitis
Blepharitis diagnosis can be done by history of symptoms, gross examination of face and eyelid and eye examination using slit-lamp.
Past Medical History of the Patient
Your ophthalmologist will ask you general questions about your general health, allergies, medications, your work environment and any previous eye problems, surgeries or eye drops. He will ask you also about your main or chief complains and what symptoms you have.
Gross Examination of the eye
Including the appearance of eyelid, eyelashes and skin.
Your doctor will be able to diagnose it by external examination of your eyes using slit-lamp. Things that your doctor will be looking for:
1- Anterior Type of Blepharitis
Which is an eye lid infection and there will be hyperemia, telangiectasias of the anterior margins with collarettes which is hard white scales located around the base of the lashes. There will be also discharge from your eyes which is green to yellow in color.
Hyperemia and greasy anterior margin with sticky eyelashes. There are scales which located anywhere on lid margin and lashes.
In both form with long standing or chronic disease there will be scarring of lid margin and abnormalities of eyelashes like losing of eyelashes (madarosis), whitening of the eyelashes (poliosis) and misdirection in the growth of eyelashes (trichiasis).
Sleeving is associated with infection by the eyelash parasite called demodex folliculorum. Sleeving is a material like is collected around eyelashes and a tube like
2- Posterior Type of Blepharitis
Foamy tear film, Hyperemia, telangiectasia and obstruction of meibomian gland orifices with inflammation around them.
Changes on the conjunctiva which is called papillary reactions. Blepharitis can cause conjunctivitis which will cause pink eye.
Corneal inflammation and changes which include erosions on the epithelial surface of the cornea which in chronic cases lead to corneal infections with ulcer formations.
Tear film Evaluation
To check the quantity and quality of the tears.