Abstract
Summary
The limits to which accommodation can be changed by interposition of spherical lenses without a change in convergence at a fixation distance of 40 cm are 4.75 D. and 0.75 D. From 4.25 D. to 1.50 D. the actual accommodation is 80% of the lens value used for stimulation.
Convergence cannot be changed without slightly changing accommodation. Between the limits of —11 P.D. and +18 P.D. this change amounts to 0.01 D. change in accommodation with each 1.0 P.D. change in convergence.
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