The commoner diseases of the eye : how to detect and how to treat them . / METER Position of the Light in Using the Plane for Skiascopy. valuable in dealing with children, illiterates, am-blyopeSj and others where an accurate subjectiveestimation of the full amount of the ametropia 96 COMMONER DISEASES OF THE EYE is, for obvious reasons, difficult or is, on the whole, the most satisfactory, object-ive test we possess. Where it is possible, theskiascopic result should afterwards be verifiedby test The Thorington Light-Screen. In employing this test the examiner should bes
The commoner diseases of the eye : how to detect and how to treat them . / METER Position of the Light in Using the Plane for Skiascopy. valuable in dealing with children, illiterates, am-blyopeSj and others where an accurate subjectiveestimation of the full amount of the ametropia 96 COMMONER DISEASES OF THE EYE is, for obvious reasons, difficult or is, on the whole, the most satisfactory, object-ive test we possess. Where it is possible, theskiascopic result should afterwards be verifiedby test The Thorington Light-Screen. In employing this test the examiner should beseated in a darkened room one meter, or aboutthree feet, in front of and facing the patient,whose accommodation, if he be tinder fortyyears of age, should be paralyzed by means ofa cycloplegic—atropin solution, or homatropinand cocain. i AMETROPIA. FITTING OK GLASSES.—OPHTHALMOSCOPE •i The light should he placed above and behindthe patients head, if a concave mirror is used;or it should be within five or six inches of theobservers eye, if the plane mirror. The sourceof light should be covered with a Thoringtonlight screen, or asbestos chimney, provided withan iris diaphragm to regulate the amount oflight falling upon the observers retinoscopemirror. The mirror with which the light is reflectedinto the eye has a small opening in its center(through which the observer looks), the edge ofthe mirror resting against the edge of the light is thrown from the mirror into the eyeso that the red reflex of th
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Keywords: ., bookcentury1900, bookdecade1900, bookidcommonerdise, bookyear1904
