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Table 2 Sample dimension and means and standard deviations of scoring on the CISS questionnaire. (N-sample size; CISS-convergence insufficiency symptom survey; SD-standard deviation; NBV-normal binocular vision; OBD-other binocular dysfunctions; CI-convergence insufficiency; AI-accommodative insufficiency)

From: Convergence insufficiency and accommodative insufficiency in children

Visual condition N / % School year (N) Gender (N) CISS
5th year 6th year Male Female Mean ± SD
NBV 165 / 56,5 86 79 86 79 7,99 ± 6,0
CI 41/14 23 18 21 20 11,55 ± 9,4
Low 21 / 7,2 10 11 9 12 9,71 ± 8,2
High 14 / 4,8 10 4 9 5 11,5 ± 9,3
Definite 6 / 2 3 3 3 3 19,17 ± 11,2
AI 29/10 19 10 12 17 18 ± 9,2
With CI 9 / 3,1 8 1 6 3 17,44 ± 7,8
Without CI 20 / 6,8 11 9 6 14 18,45 ± 10,0
OBD 66 / 22,6 47 40 36 51 12,49 ± 9,6