<P> It should not be used while wearing contact lenses, during eye infections or in people with a history of herpes virus infections . Side effects include burning sensation (common), redness, discharge, watery eyes, eye pain, foreign body sensation, itching, stinging, and blurred vision . Long term use of ciclosporin at high doses is associated with an increased risk of cancer . </P> <P> Cheaper generic alternatives are available in some countries . </P> <P> There are methods that allow both natural and artificial tears to stay longer . </P> <P> In each eye, there are two puncta--little openings that drain tears into the tear ducts . There are methods to partially or completely close the tear ducts . This blocks the flow of tears into the nose, and thus more tears are available to the eyes . Drainage into either one or both puncta in each eye can be blocked . </P>

What is the most common cause of ded