TearScience® LipiView® II Ocular Surface Interferometer with Dynamic Meibomian Imaging™ (DMI) measures lipid layer thickness (LLT) with nanometer accuracy, captures blink dynamics, and images meibomian gland structure. The meibomian glands are the oil glands in your eyelids that make the oil portion of the tears. This part of the eye accounts for at least 85% of all dry eye disease! Our doctors check your eyelids for signs of gland dysfunction during your annual eye exam and may recommend you have this testing since you can begin to have permanent anatomy changes before you ever have symptoms of dry eye. We want to catch you as early in the dry eye disease state as possible to have the best outcomes!