Instructions for Operating the Universal Ophthalmometer
Instructions for Operating the Universal Ophthalmometer
General Optical Co
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) CROSS HAIRS IN FOCUS (FIGURE E) V A G E FOUR FOCUSING THE HAIR LINES (FIGURE F) Fifth: — Turn dial so that both sight holes (part 14-14) are in horizontal position. This will bring the figure 45 on the large dial to the top of the instrument. Then raise or lower instrument until white spot (part 4) at side of head rest is visible through the sight hole, in dial. [This is done by turiung large adjusting screw (part 12) at oper- ator's end of instrument. See operator's left hand in figure C] [B...e sure locking handle (part 9) is [MAGES CENTERED ON CROSS HAIRS (FIGURE G) PAGE FIVE LOCKINC. THE INSTKUMENT (FICUUK II ) loose. ] Swing blinder (part 3), attached to head rest, so that it covers patient's left eye. Then swing telescope until patient's right eye is in position di- rectly before it. Instruct patient to look into tele- scope for the rellection of her own eye, and to look steadily at it . SixtJi: — Operator then adjusts telescope by raising or lowering or turning from side to side until images of mires are located and central images are centered on cross hairs.
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