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93
Grouping the first two of these classes under the heading "Hypermetropia,"
and the four latter under the heading " Myopia," we find that
75 per cent. are " Hypermetropes," and 25 per cent. " Myopes."

As in previous reports girls are in the preponderence, accounting
for 59 per cent. of all the cases. The girls show a higher percentage
of Hypermetropia (76 per cent.) than the boys (73 61 per cent.),
and a corresponding lower incidence of Myopia.

The above table shows the variation of the refractive error with age.
Considering first Hypermetropia and neglecting oscillations we find
a steady decrease from 58 to 36 per cent. in the nine years under consideration.
There is a corresponding decrease, but not so marked in
the Astigmatic Group, from 37 to "28 per cent. In the Myopic Group,
on the contrary, there is a steady increase, from 5 to 36 per cent. We
are led to the conclusion that the diminution in the Hypermetropic and
Astigmatic Groups has been due to the transference of these cases to
the Myopic Group.