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The tear film is a thin layer approximately 100 nm thick. By irradiating white light on the tear film surface, several interference patterns appear by the difference in the two specular reflection light paths obtained between the surface and the back of the lipid layer. An advanced optical system designed for the shape of the cornea makes it possible to observe the interference image in a wide area. By the principle of specular reflection, the break-up of the tear film can be observed in a non-invasive manner.
Observation of the tear film by light interference imaging.
The Kowa DR-1α enables you to observe changes in the interference color patterns spreading on the lipid layer and the break-up of the tear film. Also you can observe the tear film on contact lenses.
Data output is simple