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Dry eye patients are unique in that their individual case could be related to any combination and number of direct and underlying causes. Helping your eye doctor to narrow down if your dry eye is evaporative or aqueous would be the first step. If your eye doctor offers a dry eye survey, complete it. Your answers are 50% of the work to determine your diagnosis. Your eye doctor can then determine the tests they may want to run. Here are a few types:

Staining tests

Lissamine green, rose bengal and fluorescein staining show where the mucin is no longer protecting the surface of your eye.

TBUT (Tear Break Up Time) know your TBUT

This is the time between your last blink and the first spot on your eye to dry under what is called a slit lamp.This is usually performed with a drop of fluorescein dye to clearly identify the dry spot.

Paper strip and thread tests

Measure your tear wetting & tear volume.

Other testing

Hand-held tear readers.

P r o c e s s i n g . . .