Artificial tears

Artificial tears are lubricant eye drops or eye ointments used to moisten and relieve the irritation associated with deficient tear production in dry eyes.  They are used also to moisten contact lenses and in eye examinations.  They are composed of water, salts, and polymers without the proteins found in natural tears.  Eye drops are the most common form of artificial tears but there are also ointments that are usually prescribed for extremely dry eyes and may provide longer relief than drops.
Eye drops are best for all-day use while the eye ointments are best used at bedtime because the ointments cause blurred vision.  For the relief of dryness and irritation caused by allergic conjunctivitis, artificial tears help moisten the eyes by diluting accumulated allergens and preventing them from sticking to the conjunctiva. 

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