It is essential to use non-invasive methods for assessing tear film in routine clinical practice. Lateral shearing interferometry has proven to be the best method for the non-invasive characterisation of tear film surface quality. It can differentiate normal from dry eyes and has the unique ability to distinguish contact lens material on eyes.
Nevertheless, two major drawbacks limit the widespread application of the existing interferometry methods. On the one hand, they cover only a small portion of the eye and on the other they are highly sensitive to eye movements. This project aims to develop a new lateral shearing interferometer that would surmount these problems and explore alternative approaches based on the polarimetry and profilometry.