Eye and Contact Lens Movement Measurement

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Abstract
An accurate and relatively simple method of measuring eye and contact lens movement was developed. A hidden ultra-highspeed motion picture camera, a digital film data analyzer, and computer data reduction are used to define and separate eye, head and contact lens movements. The technique has an eye rotational accuracy of .apprx. 0.2.degree. and a linear translational accuracy of better than 0.05 mm over a field of view of > 60.degree.. This procedure requires no extraneous hardware, fixtures or eye restraints, so data can be obtained in a natural environment. It provides a method of evaluating motility training procedures, studying contact lens fitting methods, and investigating tear pumping mechanisms.

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