<unk> : swollen and reddened eyelid Diagnosis of the condition is done via a physical examination under a slit lamp. Cultures of debris are occasionally collected for bacterial or fungal testing. Examination In all forms of<unk> , optometrists or ophthalmologists examine the tear film, which is the most efficient method in determining instability. The most frequently used method is to measure tear production via tear break-up time (TBUT), which calculates the duration interval between complete blinks. This serves as a primary indication of regional dryness in the pre-corneal tear film after fluorescein injections. If TBUT is shorter than 10 seconds, then this suggests instability. Staphylococcal<unk>  is diagnosed by examining erythema and edema of the eyelid margin. Patients may exhibit alopecia areata of eyelashes and/or growth misdirection, trichiasis. Other signs may include telangiectasia on the anterior eyelid, collarettes encircling the lash base, and corneal changes. Seborrheic<unk>  is distinguished by less erythema, edema, and telangiectasia of the eyelid margins. Posterior<unk>  and Meibomian gland dysfunction are frequently associated with rosacea and can be seen during an ocular examination of the posterior eyelid margin. The Meibomian glands may appear caked with oil or visibly obstructed. Procedures Cultures of the eyelid margins can be a clear indicator for patients suffering from recurrent anterior<unk>  with severe inflammation, in addition to patients who are not responding to therapy. Measurements of tear osmolarity may be beneficial in diagnosing concurrent dry eye syndrome (DES), which may be responsible for overlapping symptoms and would allow the physician to decipher between conditions and move forward with the most beneficial protocol for the patient. Consequently, the measurement of tear osmolarity has various limitations in differentiating between aqueous deficiencies and evaporative dry eye. Microscopic evaluation of epilated eyelashes may reveal mites, which have been evident in cases of chronic blepharoconjunctivitis. A biopsy of the eyelid can also determine the exclusion of carcinoma, therapy resistance, or unifocal recurrent chalazia. Condition Entity Bacterial infections Erysipelas (due to Streptococcus pyogenes) Impetigo (due to Staphylococcus aureus) Viral infections Herpes simplex virus Molluscum contagiosum Varicella zoster virus Papillomavirus Vaccinia Parasitic infection Pediculosis palperbrarum Immunologic conditions Atopic dermatitis Contact dermatitis Erythema multiforme Crohn's disease Dermatoses Psoriasis Erythroderma Benign eyelid tumors Actinic keratosis Pyogenic granuloma Malignant eyelid tumors Melanoma Mycosis fungoides Basal cell carcinoma Trauma Chemical Radiation Surgical Thermal Toxic conditions Medicamentosa
Blepharitis
Periorbital cellulitis
Capillaritis
Ocular larva migrans
Orbital cellulitis
Sympathetic ophthalmia
Periorbital dermatitis
Corneal ulcer