corneal sensation test

The corneal sensation test is used to check whether the corneal sensation is normal. If keratitis or ulceration is found without significant irritation, a corneal sensation should be performed to determine if the trigeminal nerve has reduced or paralyzed symptoms. During the inspection, a small piece of sterile cotton can be twisted into a pointed shape, and the tip of the cornea can be touched with its tip; it should be noted that it should be touched from the side of the eye. It is best not to let the patient see the examiner's movement from the front to avoid defensiveness. The blink of an eye is confusing and correct. Basic Information Specialist Category: Ophthalmic Examination Category: Other Inspections Applicable gender: whether men and women apply fasting: not fasting Tips: Inappropriate people: no patients with eye diseases or other diseases. Normal value If the perception is normal, when the cornea is touched, the reflex blink movement must occur immediately. If the reflex is slow, it means that there is a decrease in perception. If the perception disappears completely, there is no performance after the touch. Both eyes should be tested the same for comparison and judgment. Clinical significance Abnormal results Dendritic keratitis is one of the most common local causes of corneal dysfunction, and herpes zoster is also one of the causes of corneal dysfunction. Patients with a loss of corneal sensation need to be examined. Precautions Taboo before inspection: Do not apply medicine and touch with your hands. Requirements for examination: The patient is lying in bed. Inspection process During the inspection, a small piece of sterile cotton can be twisted into a pointed shape, and the tip of the cornea can be touched with its tip; it should be noted that it should be touched from the side of the eye. It is best not to let the patient see the examiner's movement from the front to avoid defensiveness. The blink of an eye is confusing and correct. Not suitable for the crowd Inappropriate people: no patients with eye diseases or other diseases.