Generally, when we go to an optical shop to match glasses, a more professional optometrist should help us do a slit lamp microscope examination to determine the health of the eyes, which can help find potential eye diseases or the cause of rapid vision loss in advance. It has a good guiding role for customers' scientific use of eyes and wearing glasses. Therefore, it is very important for the optometrist to master the use of a certain slit lamp microscope, so what should be paid attention to before using the slit lamp microscope?
To check the instrument before use, first insert the focus stick into the corresponding socket of the instrument and turn on the switch of the lighting power supply. According to the user's refractive error, rotate the adjustment rings of the two eyepieces; rotate the eyepieces so that the center distance of the two lenses is consistent with the pupil distance of the observation eye. Move the microscope along the moving slide, one hand holds the handle forward and backward for coarse focusing, and the other hand holds the joystick to move forward and backward for fine focusing until the fissure image seen is clearest; observe whether the fissure image brightness is sufficient , Uniform. Generally should not be less than 2000lx; open a large gap, rotate the aperture dial, and watch the shape of the aperture, whether the color filter is good, and whether the aperture rotation is flexible. The maximum height of the fissure image is 8mm and the minimum is 0.2mm. Open the aperture and adjust the fissure to see whether the fissure image opens and closes flexibly and evenly, whether the two sides are parallel, and whether there are burrs. The narrowest part of the fissure image should be less than 0.2mm. The maximum width should be 8mm; check whether the orientation adjustment of the fissure image is good, the fissure image should be freely rotatable around the central axis; check whether the confocal coaxiality is good, and the microscope should be placed directly in front at this time, the fissure system is slightly to the left or To the right position; finally remove the focus stick. When the user replaces it, it must be recalibrated.
Before use, pay attention to adjusting the instrument first to make the subject sit comfortably, and fix the head on the jaw rest and forehead; adjust the height of the table top, the headrest up and down and the height of the instrument to make the fissure image up and down in a proper position. Note: After adjustment, the outer border of the examined eye is aligned with the engraved mark "one" on the side of the head frame; adjust the left and right and front and rear positions of the instrument through the joystick and joystick to ensure that the position of the fissure image is correct and can be clearly observed. Turn the hand wheel to change the slit width: change the angle between the slit illumination system and the binocular stereo microscope system, and you can also use this handwheel as a handle; the slit length can be adjusted by rotating the aperture; tighten the screw to fix the slit gland illumination system and binocular Stereo microscope system; the gaze lamp can be rotated 180o left and right, and can be freely selected up and down, far and near. It is necessary to keep the affected eye looking at the target direction. Before the examination, it should be considered whether to use mydriatic medicine, because the anterior chamber and iris are checked, and it is inconvenient to observe after the mydriasis. , While checking the lens, vitreous body and fundus, pupils must be dilated.
