Since Donders first promulgated the statement that strabismus convergens always depends upon hypermetropia, to the present time, the study of the etiological factor or factors concerned, has been one of ever-increasing interest; yet much still remains unknown and unsettled in our knowledge of this complex condition. A step was taken forward when it was proven beyond question that there must be a something besides hypermetropia to determine a squint. Schweigger, Stilling, Hansen-Grut, Wahlfors and others have attacked the subject, but no one theory explains all the features sometimes encountered.
The early age at which squint usually shows itself adds much to the difficulties of our gaining knowledge of the pre-existing conditions. The best way to approach the subject is by a careful study of cases. In doing this we often encounter phenomena that can not be explained by any of the ideas yet advanced.
Leaving to others a discussion of
RAY JM. THE COSMETIC AND VISUAL RESULTS IN SQUINT. JAMA. 1901;XXXVII(18):1165–1167. doi:10.1001/jama.1901.62470440015001d
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