strip retinoscopy

The strip photorefraction method is similar to the ordinary point (circular) retinoscopy mirror, and can be used as a general plane retinoscopy mirror; the different general reconnaissance mirrors are placed on different meridian lines and observed perpendicular to each other. There is no difference in the characteristics of the light band to determine the presence or absence of astigmatism. All types of astigmatism can be measured by the moving light band. When the plane mirror is inspected, the casing is restored to the original position, and the lamp holder tube is rotated by the index finger, and the light is placed on different meridians to observe whether there is a difference in the pupil light band on each meridian. If there is no astigmatism, there is no light band in the pupil on each meridian. The difference is that there are differences in astigmatism. Basic Information Specialist Category: Ophthalmic Examination Category: Other Inspections Applicable gender: whether men and women apply fasting: not fasting Tips: Patients with inflammation of the eyes are forbidden. Normal value Generally, the height of the refractive error band is dark, slow, and wide; the low is bright, fast, and narrow, and disappears. When the light band is dark, it is difficult to observe and see for high hyperopia and myopia. Because the luminosity in the pupil is too dark and the boundary is unclear, it is difficult to compare the characteristics of the light bands on each meridian. The casing must be moved down slowly to change the incident beam. The degree of convergence, so that the smooth light band in the pupil appears narrow and bright, as the degree of downward movement should be until the narrowest and brightest. Clinical significance Abnormal results When the light band is dark, it is difficult to observe and see for high hyperopia and myopia. Because the luminosity in the pupil is too dark and the boundary is unclear, it is difficult to compare the characteristics of the light bands on each meridian. The casing must be moved down and changed. The degree of convergence of the incoming beam, so that the moving light band in the pupil appears narrow and bright, and the degree of downward movement should be until the narrowest and brightest. The person in need of examination is ametropia. Precautions Contraindications before examination: refractive error is not correct. Requirements for inspection: Pay attention to the width, brightness, and speed of the light belt to judge the nature and extent of the refractive error of the eye. During the inspection, the index finger slowly rotates the lamp holder to observe whether there is a difference in the pupil light bands of each warp. Inspection process When the plane mirror is inspected, the casing is restored to the original position, and the lamp holder tube is rotated by the index finger, and the light is placed on different meridians to observe whether there is a difference in the pupil light band on each meridian. If there is no astigmatism, there is no light band in the pupil on each meridian. The difference is that there are differences in astigmatism. Generally compare 90 and 180 degrees, 45 and 135 degrees warp. That is to say, when the refractive error of the 180 degree meridian is checked, the light belt is placed at 90 degrees for left and right rotation; when the 90 degree warp is checked, when the upper refractive error is correct, the light belt is placed at 180 degrees for up and down rotation. Similarly, the 45-degree warp light strip was placed at 135 degrees, along 45 degrees, and the warp was biased. Not suitable for the crowd Inappropriate crowd: Patients with inflammation of the eyes.