Instrument for simultaneous assessment of fluorescein and thermal dynamics of the tear film

Ocular thermography has been identified as a potential technique for non-invasive assessment of various tear-film disorders, particularly dry eye. Using infrared thermal imaging, past studies have shown that changes in ocular surface temperature (OST) are associated with tear-film break-ups. Contact lens wear is associated with warming of the tear-film, however this mechanism is not fully understood. In this study a custom-built instrument for simultaneous assessment of fluorescein and thermal changes associated with tear film dynamics during contact lens wear, was developed and tested.