Some investigations should be done to determine the condition of dry eye. These measurements alone are not enough. Daily life and situations at different times should also be considered. All of these should be brought together and the dry eye should be evaluated.
Determination of corneal injury: The cornea is a very sensitive tissue. It is very much affected by thirst. The structure of the cells deteriorates, begins to peel off, tissue losses occur. If you look at it with cobalt blue with fluorescein dye, the distorted areas give a green image.
Density (osmolarity) of the tear : The osmolarity of the tear, that is, its consistency, is also important. If it is less, it will become sedimentary. Sedimentation gives the appearance of burrs. It is in the state of the dirty eye and the stinging eye. The density should be at a normal level. The ophthalmologist already evaluates this at the time of the examination.
Tear breaking time examination: It is the time for the tear film to disintegrate. This period is shortened in case of dry eye.
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 under the 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 breaks. The last break is 10.6 +4.01 seconds.)
Schirmer test: Special strip-shaped The test paper is folded and placed on the outer 1/3 of the lower eyelid. He is asked to make normal eye movements.
Wetting less than 5 mm after 5 minutes is the cause of dry eye.
Between 5-10 is suspicious dry eye condition. It is necessary to monitor.
More than 10 mm indicates that there is no dry eye.
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