Ocular refraction and the shadow test . The retinoscopic exa ing; while it is entirely correct, it may make the point clearer to statethat the mirror should be tilted or inclined. Plate 137 illustrates the correct method of holding the retino-scope. The handle is lightly but firmly grasped, close up to the mir- I70 OCULAR REFRACTION. ror ; the instrument is heldsquarely before the eye and touching theforehead. Either eye may be used as preferred by the operator. The mirror is inclined in various directions, or tilted, by amovement of the wrist alone, the head to be held motionless. Thisdirects
Ocular refraction and the shadow test . The retinoscopic exa ing; while it is entirely correct, it may make the point clearer to statethat the mirror should be tilted or inclined. Plate 137 illustrates the correct method of holding the retino-scope. The handle is lightly but firmly grasped, close up to the mir- I70 OCULAR REFRACTION. ror ; the instrument is heldsquarely before the eye and touching theforehead. Either eye may be used as preferred by the operator. The mirror is inclined in various directions, or tilted, by amovement of the wrist alone, the head to be held motionless. Thisdirects the movement of the light beam; a very slight movement issufficient to cause the light to pass across the face of the Plate 137. Correct method of holding the retinoscope. Some operators have a habit of holding the retinoscope firmlyagainst their forehead, and tilt the mirror by a movement of thehead, to the right and left, up and down, etc. This style of operat-ing appears awkward, the operator bobbing his head in an apparent-ly aimless fashion; it gives one the appearance of one of the porce-lain figures representing a Chinese Mandarin. I R E T I N O S C O P Y. 171 It is just as well to cultivate a clean-cut style of operating,which is not difficult ; it pays well, because it inspires confidence inthe patient to have the Refractionist display an easy manner in hiswork, denoting familiarity with it, and skill. Plate 138 illustrates the light beam from the retinoscope project-ed directly upon the eye. In the illustration it is seen to create acircular spot of light upon the face, about two inches in diameter. This is called the Light Area. If the retinoscope be tilted slightly, this light area will o
Size: 1410px × 1772px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookidocularrefrac, bookyear1903
