Wednesday, September 1, 2010
How Salty Are Your Tears? Why Does That Matter?
Why is this an important measurement? Well, the two most important causes of a Dry Eye, or dry eye symptoms are problems in the production of either the salt water part of your tears, or in the production of the oil or lipid part of your tears. If you have a HIGH Tear Osmolarity it is most likely that your problem stems from something wrong with the production of the salt water in your tears. Either you are not making enough, or what you are making is not working well enough. A LOW Tear Osmolarity does not mean that you don't have Dry Eye Syndrome, it simply means that some other factor is the underlying cause.
The best research available right now shows that a Tear Osmolarity of under 300 is probably normal, or at least "normal enough"! Anything over 308 is abnormal. Measurements between 300 and 308 have to have some additional information from your exam to be meaningful. We will always tell you your number!
As far as we know Skyvision Centers was the first eye center in Northeast Ohio to use Tear Osmolarity in the care of Dry Eye.