What is the normal NIBUT in healthy dogs compared with dogs with EDED?

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Study for the ACVIM Small Animal Internal Medicine Exam to enhance your veterinary knowledge. Prepare with flashcards and multiple-choice questions, featuring hints and explanations. Ensure success in your exam journey!

Multiple Choice

What is the normal NIBUT in healthy dogs compared with dogs with EDED?

Explanation:
Non-invasive tear film break-up time (NIBUT) measures how long the tear film remains uniform on the eye without using dye. In healthy dogs, the tear film stays stable for about 20 seconds on average. In dogs with evaporative dry eye disease (EDED), rapid tear film breakup occurs because the tear film is unstable, especially due to lipid layer issues that increase evaporation, so the NIBUT drops to under 5 seconds. This is why the best matched statement is that healthy dogs have around 20 seconds, while dogs with EDED have a NIBUT of less than 5 seconds.

Non-invasive tear film break-up time (NIBUT) measures how long the tear film remains uniform on the eye without using dye. In healthy dogs, the tear film stays stable for about 20 seconds on average. In dogs with evaporative dry eye disease (EDED), rapid tear film breakup occurs because the tear film is unstable, especially due to lipid layer issues that increase evaporation, so the NIBUT drops to under 5 seconds. This is why the best matched statement is that healthy dogs have around 20 seconds, while dogs with EDED have a NIBUT of less than 5 seconds.

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