Table 4: Differences between baseline and posttreatment values of CISS, NPC and PFV.
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Group I 
Group II 
Mean CISS Score 
Baseline 
27.9±4.6 
27.7±3.9 
At 12^{th} Week 
15.9±3.7 
14.6±4 
Statistical Significance 
Z=1.011, p<0.05

Mean NPC 
Baseline 
10±2.6 
9.5±3.1 
At 12^{th} Week 
5.1±1.6 
4.9±1.6 
Statistical Significance 
Z=0.754, p<0.05

Mean PFV 
Baseline 
4.2±1.5 
4.1±1.4 
At 12^{th} Week 
14.5±3.1 
14.9±1.9 
Statistical Significance 
Z=1.335, p<0.05

Data are presented as mean ±SD; CISS: Convergence insufficiency Symptom Survey score; NPC: Near convergence point in centimeters; PFV: positive fusional vergence in prism diopters.