The lens of the eye is the time for the tear on the cornea to break down. It determines the quality of the tears and the state of the tear pattern. It is an easy application.
Frequent blinking prolongs the refraction time. Because, as the eye blinks and opens and closes, water secretion from the lacrimal gland increases, mucin, aqueous and lipid balance is preserved.
Blinking less, that is, staring at something (such as reading a lot, looking at a cell phone or computer) shortens the breakout time period. Tears disintegrate quickly. There is dry eye.
If the tear is dense, that is, its osmolarity is high, it sticks to the eye and adheres to the cornea, and the breakage time is prolonged. Excess density is the cause of hazy vision and burrs.
The most important issue at the time of tear rupture is the oil production of the meibomius gland, the cleaning of the residues of the outflow tracts and the meeting of the oil with the water called aqueous.
What influences tear break-up time? Mucin, aqueous (water) and lipid (oil) balance. When this balance is disturbed, if the aqueous decreases, the tears become denser, sediments are formed, and the breakage time is prolonged. If the lipid decreases, it flows like aqueous water, leaves the eye, and the tear break-up time is shortened.
Peak: Fluorescein, which gives color to the eye, is dripped. The patient looks fixed after blinking 3 times in a row. It is viewed with cobalt blue in a bio microscope. Fracture manifests itself as black dots. This refraction is around 10 seconds in the healthy eye. It shows dry eye for a shorter time.
(4.14+3.84 is the first time it is broken. The last is 10.6 +4.01 seconds.)