Dry eye disease.

Dry eye (DED) is a multifactorial disease that results in symptoms of discomfort, visual disturbance, and tear film instability with potential damage to the ocular surface, accompanied by increased osmolarity of the tear film and inflammation. DED is a common clinical problem and is among the most frequent diagnoses in ophthalmology. It substantially affects quality of life because of the constant ocular discomfort and decrease in visual function.

Blepharitis.

Blepharitis is a chronic inflammatory process of the eyelid margin. It is a common eye disorder throughout the world and can affect any age group. It may be associated with several systemic diseases, particularly rosacea and seborrheic dermatitis, and is related to other ocular conditions like dry eye, chalazion, conjunctivitis, and keratitis.

Trichiasis.

Trichiasis is a lid margin disorder in which the eyelashes are misdirected toward the ocular surface. It is a major cause of ocular morbidity. Trichiasis is secondary to inflammation and scarring of the eyelash follicles.