tear pH

The tear pH is usually measured on a precision pH test paper. The microelectrode can also be directly placed in the lower jaw, and the measurement result is more accurate. The pH of the tear is related to the CO2 content. The pH value of the tears of the flight personnel is higher than that of the normal normal people. Basic Information Specialist Category: Ophthalmic Examination Category: Body Fluid Examination Applicable gender: whether men and women apply fasting: not fasting Analysis results: Below normal: Rare. Normal value: Tears pH: 6.4-7.7 Above normal: Tear pH is often increased in patients with dry keratoconjunctivitis, corneal damage, and spring conjunctivitis. negative: Positive: Tips: You can't rub your eyes with your hands before you check, and you can't use eye drops. Normal value pH 6.4 ~ 7.7. Clinical significance Abnormal results: The pH is slightly lowered after a long period of closed eyes. The tear pH of patients with dry keratoconjunctivitis, corneal damage and spring conjunctivitis often increases, while the tear pH of patients with trachoma and bacterial conjunctivitis does not increase. When artificial tear rehydration therapy is applied to patients with ocular diseases, the pH value of the tears must be strictly controlled. In order to better dissolve mucus and improve eye symptoms. Therefore, the artificial tear must be measured and calibrated after preparation. Need to check the crowd: People suspected of having eye diseases. High results may be diseases: dry keratoconjunctivitis, spring conjunctivitis precautions Inappropriate people: generally no special population. Contraindications before examination: Do not rub your eyes with your hands before the test, or use eye drops. Requirements for inspection: If you collect tears with your doctor, the medicine you use may be a little irritating to your eyes, but try to do as directed by your doctor. Inspection process The tear collection method has different contents of each component at different times. The method of tearing should be selected according to the purpose of the examination and the amount of tears, such as the stimulating tearing method, the capillary tearing method, and the adsorption tearing method. Not suitable for the crowd no. Adverse reactions and risks no.