Quote (from the NHS website):
"There are many recipes for cleaning solutions and the best proportions or products to use can vary, depending on the individual.
A popular recipe involves pouring a pint of boiled water into a bowl, adding either a drop of baby shampoo or tea tree shampoo – or a teaspoon of bicarbonate of soda – and allowing it to cool before using. You could also use a commercial eyelid-cleaning solution". (i.e. you use it to clean your eyelid)
More here:
http://www.nhs.uk/Conditions/Blepharitis/Pages/Treatment.aspx
Pharmaceutical companies produce leaflets that have to be of a 'one size fits all' nature, whereas doctors (and pharmacists if you use their consulting facilities) know what's OK (or not) for individual patients. If your doctor says that an occasional drink will be OK then you should trust him/her.
As an analogy, a colleague of mine told his GP (who was also my doctor, and definitely 'of the old school') that the hay fever tablets he was taking didn't seem to be strong enough at night but the packaging said 'Do not exceed the stated dose'. My friend was also fond of a drink or two (or three or four!) and didn't like the fact that the packaging of the hay fever tablets said "Avoid alcohol". The doctor said "Stuff all that lot. Just do what I do and take a quadruple dose every night, accompanied by a
very large whiskey". That advice never seemed to do my friend, or our GP, any harm ;)