Page 121 - DISINVESTMENT AND IMPLEMENTATION OF VISION SCREENING TESTS BASED ON THEIR EFFECTIVENESS

Effectiveness of routine population-wide orthoptic preschool vision screening tests at age 6-24 months in The Netherlands
Type of amblyopia
Strabismus amblyopia was detected in 50 versus 27 children, of whom 26 (52%) versus 12 (44%) were detected between 6-24 months, and 14 (28%) versus seven (26%) with VA measurements at 36-60 months. The other ten (20%) versus eight children (30%) were detected outside of screening.
Refractive amblyopia was detected in 60 versus 68 children, of whom five (8.3%) versus two (2.9%) with screening between 6-24 months and 54 (90%) versus 62 (91.2%) with VA measurements at 36-60 months. One (1.7%) versus four children (5.9%) were detected outside of screening.
Combined mechanism amblyopia was detected in 17 versus 16 children, of whom seven (41.2%) versus nine (56.3%) were detected between 6-24 months and four (23.5%) versus four (25%) with VA measurements at 36-60 months. Six (35.3%) versus three (18.8%) were detected outside of screening.
Bilateral amblyopia was detected in 49 versus 40 children, of whom five (10.2%) versus two (5%) with screening between 6-24 months and 40 (81.6%) versus 30 (75%) with VA measurements at 36-60 months. Four (8.2%) versus eight (20%) were detected outside of screening.
Deprivation amblyopia was detected in two versus four children. Both children in the control group were detected between 36-60 months. One child in the intervention group was detected between 6-24 months, one between 36-60 months and two outside of screening.
Type of amblyopia was unknown in seven versus four children.
There was no significant difference between the number of amblyopia cases between the two groups; 185 children (3.3%) in the control group versus 159 children (3.1%) in the intervention (p 0.613). There were slightly more strabismus and slightly less refractive amblyopia cases in the control group. Strabismus amblyopia was diagnosed earlier.
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