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229
It is a recognised finding that vision is more defective in
secondary than in elementary schools. It was, unfortunately, not
possible, owing to pressure of routine duties, for the medical officers
to conduct any investigation into the relationship between lighting,
position of desks, etc., and the amount of visual subnormality.
The following Table was compiled from the findings at routine
medical inspections, in order to ascertain the comparative amount
of visual defect in the various schools. It relates only to those
children who were referred for treatment and observation and who
were consequently thought to be in need of corrective glasses. The
Table does not give the actual amount of visual defect, but the
amount of uncorrected visual defect.

Note:—Where a dash is placed, children we re examined but no visual defects
were found.