Dry eye disease (DED) is a clinically significant multifactorial disorder of the ocular surface and tear film as it results in ocular discomfort and visual impairment and predisposes the cornea to infections. It is important for the quality of life and tends to be a chronic disease. It is also common, as the prevalence is estimated between 5 % to 30 % and this increases with age. Therefore, it is recognised as a growing public health problem that requires correct diagnosis and appropriate treatment. There are two main categories of DED: the deficiency of tear production (hyposecretive), which includes Sjögren syndrome, idiopathic or secondary to connective tissue diseases (e.g. rheumatoid arthritis), and non-Sjögren syndrome (e.g. age-related); and the tear evaporation category, where tears evaporate from the ocular surface too rapidly due to intrinsic causes (e.g. meibomian gland disease or eyelid aperture disorders) or extrinsic causes (e.g. vitamin A deficiency, contact lenses wear, ocular allergies). Management of the disease aims to enhance the corneal healing and reduce patients discomfort. This is based on improving the balance of tear production and evaporation by increasing the tear film volume (lubrication drops) and improving quality of tear film (ex omega-3 supplements, lid hygiene, tetracyclines), reducing the tear film evaporation (paraffin ointments, therapeutic contact lenses), reducing tears drainage (punctal plugs, cautery) and finally by settling down the ocular surface inflammation (steroids, cyclosporine, autologous serous), as appropriate. In this article we will review the clinical presentation, differential diagnosis and treatment options for DED.
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