Tear Break Up Time

Tear Break-Up Time (TBUT) is a crucial diagnostic test used in optometry to assess the stability of the tear film, an important factor in eye health and comfort. This test measures the interval between a complete blink and the appearance of the first dry spot on the corneal surface after the instillation of a fluorescein dye.

Evaluating TBUT provides valuable insights into the protective quality of the tear film, which is essential for maintaining corneal health and preventing ocular surface disease. Accurate measurement of TBUT helps in diagnosing tear film disorders and formulating effective management strategies.