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 who have recurrent anterior blepharitis 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. Prevention Blepharitis is a result of bacteria and inflammation from congested meibomian oil glands at the base of each eyelash. Routine washing of the eyelids helps subdue symptoms and prevent blepharitis. Washing each eyelid for 30 seconds, twice a day, with a single drop of hypoallergenic soap (e.g. baby shampoo) and ample water can help. The most effective treatment is over the counter lid scrubs used twice a day. Some doctors may recommend using a hypochlorous acid treatment depending on the severity. Treatment Blepharitis is a chronic condition causing frequent exacerbation, thus requiring routine eyelid hygiene. Hygienic practices include warm compresses, eyelid massages, and eyelid scrubs. A Cochrane Systematic Review found topical antibiotics to be effective in providing help symptomatic relief and clearing bacteria for individuals with anterior blepharitis. Topical steroids provided some symptomatic relief, but they were ineffective in clearing bacteria from the eyelids. Lid hygiene measures such as warm compresses and lid scrubs were found to be effective in providing symptomatic relief for participants with anterior and posterior blepharitis. There is inadequate evidence to draw conclusions about the use of oral doxycycline in the treatment of blepharitis. According to very low certainty data, oral doxycycline may help with symptoms like itchiness, burning, or watery eyes, but may induce more side effects. A review of treatments showed that the anti-mite drug ivermectin can be an effective treatment for reducing symptoms. Eye drops or ointments containing corticosteroids are frequently used in conjunction with antibiotics and can reduce eyelid inflammation.