The Eyes Have It

Going about we have noticed that one effect of fragrances is to cause eye irritation, watering an soreness.

It is possible to put it down to ordinary air pollution, but I came across this link:

http://www.ncbi.nlm.nih.gov/pubmed/16842608

Although it was very small scale research 10 out of 42 is quite high. If that is typical then a number of people can be affected.

But what might happen to the eyes if the irritation they experience can be almost permanent where air fresheners etc. are in use?