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Scott E Schachter, Aubrey Schachter, Milton M Hom, Scott G Hauswirth; Prevalence of MGD, blepharitis, and demodex in an optometric practice.. Invest. Ophthalmol. Vis. Sci. 2014;55(13):49. doi: https://doi.org/.
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This study aimed to identify the presence of demodex and associated signs in patients seen for routine eye exam.
The clinical parameters evaluated were degree of meibomian gland dysfunction (MGD), lash distention, lash appearance, and cylindrical dandruff (CD). Each clinical sign was rated on a scale of 0-4. If CD was observed (rating of G1-G4), the following protocol was followed: 1. Lashes were epilated. 2. Lashes were placed on a glass slide, a cover slip and drop of saline/fluorescein dye was applied to the slide. 3. Examination performed with a Celestron LCD microscope (objective lenses: 40x, 100x, 400x).
Demodex blepharitis was present in 32.4% of all subjects. MGD (G1+) was observed in 33.1% of all subjects, and of those, 46.8% were comorbid with CD and demodex blepharitis. Lash distention (G1+) was observed in 26.1% of all subjects, and of those, 89.2% were comorbid with CD and demodex blepharitis. Greasy and/or oily lashes (G1+) were observed in 31.0% of all subjects, and of those, 77.3% were comorbid with CD and demodex blepharitis.
Demodex is present in the majority of patients with lash distention (89.2%) and greasy/oily lashes (77.3%). Additionally, almost half of MGD patients have demodex present (46.8%).
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