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July 10, 1909, Vol LIII, No. 2 >

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ARTICLE | July 10, 1909

ACCOMMODATION AND DONDERS' CURVE AND THE NEED OF REVISING OUR IDEAS CONCERNING THEM

JAMA. 1909;LIII(2):115. doi:10.1001/jama.1909.92550020003002f.
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ABSTRACT

ABSTRACT OF DISCUSSION  Dr. Edward Jackson, Denver: An experimental study like this valuable one is of practical interest largely in proportion to the near resemblance of the results obtained by laboratory tests, with those secured by methods in ordinary clinical use for the measurement of accommodation. That the resemblance is here a close one is brought out by comparison with a paper I published three years ago giving the results of testing the accommodation in 3,643 persons ranging from 5 to 70 years of age. In all of these cases the static refraction had been carefully measured for the prescription of correcting lenses, and the near point was determined, not with a special test object as in the investigation of Dr. Duane, but with fine print visible to the normal eye at 10 or 15 inches. The sources of error in such examinations referred to in the paper now under

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