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Artificial tears are lubricating eye drops used to relieve dryness and irritation of the ocular surface. [1] Dry eye syndrome (keratoconjunctivitis sicca) is a common ocular surface disorder and is characterized by disruption of the tear film and increased inflammation.
There is a wide variety of artificial tear eye drops that provide different surface healing strategies. One can find bicarbonate ions, hypotonicity, high viscosity gels and ointments, and non-preserved types. They all act differently and therefore, one may have to try different artificial tears to find the one that works the best. [3]
Tears are made up of three layers: lipid, aqueous, and mucous. [7] Tears are composed of water, salts, antibodies, and lysozymes (antibacterial enzymes); though composition varies among different tear types. The composition of tears caused by an emotional reaction differs from that of tears as a reaction to irritants, such as onion fumes, dust ...
There is a chance that habitual use of artificial tears, especially when they are not needed, may cause a dependency. [ citation needed ] Like most dependencies, the body may learn that it no longer needs to produce the same quantity or quality of tears on its own, since they are supplied for it.
With the eye generally profusely watering, the type of tears being produced have little adhesive property. Water or saline eye drops tend therefore to be ineffective. Rather a 'better quality' of tear is required with higher 'wetting ability' (i.e. greater amount of glycoproteins) and so artificial tears (e.g. viscotears) are applied frequently.
If unable to receive surgery, patients should be administered artificial tears at least four times per day to the cornea to preserve the tear film. [6] In preparation for surgery, a patient may undergo a tarsorrhaphy , in which the eye is partially sewn shut temporarily to further protect the cornea as the patient waits for care.
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Most said they had used a variety of eyedrops before becoming ill, but EzriCare Artificial Tears was most commonly reported. Those drops have since been recalled , along with Delsam Pharma's ...
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