I agree with the writer that the rod test is the more scientific
test for heterophoria, and of late years have virtually discarded
the prism test, except in special cases. The tables are interesting,
but their value would be materially increased if the author would
supplement them with tables showing the refraction, and inflammation
or its results.
Was it an accident that Stevens’ phorometer showed the same amount
of right hyperphoria in one-ninth of the cases, and in thirteen of
thirty-three cases of left hyperphoria? In which of these cases was
there anisometropia and of what kind was it?
What was the refraction of the two cases of exophoria, two of left
and one of right hyperphoria by the phorometer; and was the
refraction the same in the six cases which were orthophoric by both
rod and prism?
Such studies are necessary to a clear understanding of the relative
value of these tests.