Ophthalmology Tear film break-up-time is the time: A Between the last blink and the appearance of first dry spot on the cornea B Taken for appearance of dry spot between two blinks C Taken by successive blinks to break the tear film D Taken for disappearance of dry spots on the cornea 💡 Explanation Tear film break-up-time is the time: ✓ Correct Answer: A. Between the last blink and the appearance of first dry spot on the cornea