Page 138 - DISINVESTMENT AND IMPLEMENTATION OF VISION SCREENING TESTS BASED ON THEIR EFFECTIVENESS

CHAPTER 7
Table 1. Criteria for referral or repeat measurement, according to the Dutch national guideline for vision screening, for sufficient, insufficient or failed measurement at age 36 months.3
Sufficient Insufficient
Failed measurement
RESULTS
Visual Acuity (VA) measured with APK
Monocular VA ≥ 5/6 for both eyes Monocular VA < 5/6 for one or both eyes
One line interocular difference (not logMAR, however: 5/5, 5/6, 5/10, 5/15, etc.)
The measurement failed
Only binocular VA obtained
VA was measured of one eye only
A flow-chart of the distribution of the eligible children is presented in Figure 2. Of the 10,809 eligible children aged 36 months, 1,546 children did not attend, 247 children attended but were not screened as they were already being treated by an orthoptist. Another 355 children attended but had no measurement of VA for unknown reasons. General screening time is limited, and there may have been other priorities. VA was measured in 8,661 eligible children at 36 months, in 8,448 with the APK, in 19 with the Landolt-C and in 194 children with the E-optotypes. Because of the low number in the subsets measured with Landolt-C and with E-optotypes, these were excluded from analysis.
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