
Key points
The Tear Osmometer (and included computer) is a tool that assists clinicians in classifying, monitoring, and diagnosing patients with keratoconjunctivitis sicca (KCS) or dry eye disease. The instrument can also be used to screen for dry eye prior to LASIK or other types of refractive surgery.
Unlike other methods for determining the concentration of solutes dissolved in solution, such as vapor pressure or conductivity, the freezing point method determines the concentration of a solution by accounting for all components that affect osmolality.