optic nerve exam

Optic nerve examination (opticnerveexamination) includes vision, visual field and fundus examination. Generally, you can try the method by hand and check the field of view on both sides. The paralyzed patient's backlight is sitting on the doctor's seat, about 60-100cm apart, each covering the opposite eye with the hand (the patient covers the left eye, the doctor covers the right eye), and the viewer keeps the eyeball for a moment, and the doctor uses his fingers to separate himself. Lower, left, and right slowly move from the periphery to the center. Note that the finger position should be between the examiner and the patient. If the physician's field of vision is normal, the patient should see the finger at the same time as the examiner. If the patient's field of view becomes small or abnormal, further For visual inspection. Basic Information Specialist Category: Ophthalmic Examination Category: Applicable gender: whether men and women apply fasting: not fasting Tips: Maintain a normal diet and schedule. Normal value The visual field is normal, the eyeball moves freely in the inward, upper and lower directions, and the eyeball is down and the abduction movement is normal. Clinical significance Abnormal changes in the visual field of abnormal results suggest damage to the optic nerve pathway; if the ptosis is found during the examination, the movement of the eyeball inward, upper and lower directions is limited, suggesting that there is oculomotor nerve paralysis; if the eyeball is down and the abduction movement is weakened, It is suggested that the pulley nerve is damaged. Patients who need to be examined for abnormalities in the field of vision. Precautions Forbidden before examination: Maintain a normal diet and schedule. Requirements for inspection: Actively cooperate with the doctor's work. Inspection process 1. Visual inspection (visionexamination). 2. Visual field examination (visualfieldexamination) The field of vision refers to the range that the patient can see in front of the eye and when the eyeball does not move. (1) Inspection method: Generally, the test can be performed by hand, and the visual fields on both sides are checked separately. The paralyzed patient's backlight is sitting on the doctor's seat, about 60-100cm apart, each covering the opposite eye with the hand (the patient covers the left eye, the doctor covers the right eye), and the viewer keeps the eyeball for a moment, and the doctor uses his fingers to separate himself. Lower, left, and right slowly move from the periphery to the center. Note that the finger position should be between the examiner and the patient. If the physician's field of vision is normal, the patient should see the finger at the same time as the examiner. If the patient's field of view becomes small or abnormal, further For visual inspection. Visual pathway and light reflection pathway. 3. Fundus examination (ocularfundusexamination). 4. Ocular nerve examination (oculomotornerveexamination): The oculomotor innervation exercises the movements of the levator palpebral muscle, the superior rectus muscle, the inferior rectus muscle, the medial rectus muscle and the inferior oblique muscle. If the ptosis is found during the examination, the movement of the eyeball is restricted inward, upward and downward, and all are prompted to move. Eye nerve paralysis. 5. Trolley nerve examination (trochlearnerveexamination): The trochlear nerve dominates the superior oblique muscle of the eyeball, such as the downward movement of the eyeball and the abduction movement, suggesting that the trochlear nerve is damaged. Not suitable for the crowd Inappropriate crowd: None.