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October 1962

A New Fixation Light for Strabismus Screening

Arch Ophthalmol. 1962;68(4):527-528. doi:10.1001/archopht.1962.00960030531018

Measurement of the deviation for near is facilitated if the examiner has both hands free, one to manipulate the prisms and the other to hold the occluder. If one hand must hold the fixation light, then the examiner must depend on a cooperative patient or a third person to hold the desired prism in place. The ideal location for a fixation light is between the examiner's eyes or at a point in the midline slightly below the level of the examiner's eyes. When such a light is fixated by the patient the specular reflection of its image is transmitted from the patient's cornea to the observer's eye without significant parallax. A focal light source which can be aimed at the patient's glabella or nose and thus kept from dazzling either of the patient's maculas is ideal for this purpose. It was Scobee, I believe, who first suggested this, but

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