Student Theses, Dissertations and Capstones

Document Type


Degree Name

Master of Science (M.S.) in Clinical Vision Research

Copyright Statement

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College of Optometry

First Advisor

Cristina L Law

Second Advisor

Bin Zhang

Third Advisor

Kevin Willeford

Publication Date / Copyright Date



Nova Southeastern University


PURPOSE: The intention of this study was to determine if there was an association between receded near point ofconvergence (NPC) and diagnosis of attention-deficit/hyperactivity disorder (ADHD) in school-agedchildren as compared to neuro-normal children. Differences in accommodative amplitude were investigated as well.

METHODS: This retrospective study was done by analyzing the data from examination records of fifty school-agedchildren between the ages of seven and seventeen. Twenty-five children in the experimental group withADHD were age and gender matched to twenty-five neuro-normal children in the control group. The average of each patient’s NPC break and accommodative amplitude values were used to conduct a t-test which examined if there was an association between them and a diagnosis of ADHD.

RESULTS: There was no significant difference between the average NPC break points of the neuro-normal group and the ADHD group (t(24)=1.06479, p= .14615). There was a significant difference between accommodative amplitude between the two groups t(24)=3.454, p= .0012 p

CONCLUSIONS: It was expected that NPC values would be reduced in children with ADHD as compared to their neuro-normal counterparts, but there was no significant difference found. There was a significant difference inaccommodative amplitudes between the control group and the ADHD group.




Accommodative amplitude, Attention-deficit/hyperactivity disorder, Near point of convergence



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