Table 2 outcome variables

Convergence insufficiency

*

*

*

CITT definition [17]

Vergence facility

*

*

*

Prism flipper

Distance heterophoria

*

*

*

Prism cover test

Near heterophoria

*

*

*

Prism cover test

Stereopsis

*

*

*

TNO test

Prism adaptation

*

*

*

Prism trial lens

Near positive fusional vergence (blur point)

*

*

*

Prism bar

Near positive fusional vergence (break point)

*

*

*

Prism bar

Near positive fusional vergence (recovery point)

*

*

*

Prism bar

Near negative fusional vergence (blur point)

*

*

*

Prism bar

Near negative fusional vergence (break point)

*

*

*

Prism bar

Near negative fusional vergence (recovery point)

*

*

*

Prism bar

Convergence insufficiency symptom survey score

*

*

*

Questionnaire

Near point of convergence with red green lenses (break)

*

*

*

Red-Green lenses and 500 mm ruler

Near point of convergence with red green lenses (recovery)

*

*

*

Red-Green lenses and 500 mm ruler

Near point of convergence with accommodative target (break)

*

*

*

Accommodative target and 500 mm ruler

Near point of convergence with accommodative target (recovery)

*

*

*

Accommodative target and 500 mm ruler