A randomized clinical trial of treatments for convergence insufficiency in children.
OBJECTIVE
To compare vision therapy/orthoptics, pencil push-ups, and placebo vision therapy/orthoptics as treatments for symptomatic convergence insufficiency in children 9 to 18 years of age.


METHODS
In a randomized, multicenter clinical trial, 47 children 9 to 18 years of age with symptomatic convergence insufficiency were randomly assigned to receive 12 weeks of office-based vision therapy/orthoptics, office-based placebo vision therapy/orthoptics, or home-based pencil push-ups therapy.


METHODS
The primary outcome measure was the symptom score on the Convergence Insufficiency Symptom Survey. Secondary outcome measures were the near point of convergence and positive fusional vergence at near.


RESULTS
Symptoms, which were similar in all groups at baseline, were significantly reduced in the vision therapy/orthoptics group (mean symptom score decreased from 32.1 to 9.5) but not in the pencil push-ups (mean symptom score decreased from 29.3 to 25.9) or placebo vision therapy/orthoptics groups (mean symptom score decreased from 30.7 to 24.2). Only patients in the vision therapy/orthoptics group demonstrated both statistically and clinically significant changes in the clinical measures of near point of convergence (from 13.7 cm to 4.5 cm; P < .001) and positive fusional vergence at near (from 12.5 prism diopters to 31.8 prism diopters; P < .001).


CONCLUSIONS
In this pilot study, vision therapy/orthoptics was more effective than pencil push-ups or placebo vision therapy/orthoptics in reducing symptoms and improving signs of convergence insufficiency in children 9 to 18 years of age. Neither pencil push-ups nor placebo vision therapy/orthoptics was effective in improving either symptoms or signs associated with convergence insufficiency.
Scheiman
Mitchell
M
Eye Institute, Pennsylvania College of Optometry, Philadelphia 19141, USA. mscheiman@pco.edu
Mitchell
G Lynn
GL
Cotter
Susan
S
Cooper
Jeffrey
J
Kulp
Marjean
M
Rouse
Michael
M
Borsting
Eric
E
London
Richard
R
Wensveen
Janice
J
D000293:Adolescent; D002648:Child; D003290:Convergence, Ocular; D005260:Female; D006801:Humans; D008297:Male; D015835:Ocular Motility Disorders / Q000175:diagnosis / Q000628:therapy*; D009885:Ophthalmology / Q000379:methods; D009988:Orthoptics / Q000379:methods*; D010349:Patient Compliance; D017060:Patient Satisfaction; D018579:Patient Selection; D010865:Pilot Projects; D015348:Vision, Binocular; D014792:Visual Acuity