Convergence Insufficiency Symptom Survey Calculator
Binocular Vision

Convergence Insufficiency Symptom Survey

A 15-item patient-reported questionnaire (CISS) used to screen for symptoms associated with convergence insufficiency.

Symptom Questionnaire

CISS = Σ Q1–Q15
Total CISS Score
—/ 60
Reference Borsting EJ, et al. Validity and Reliability of the Revised Convergence Insufficiency Symptom Survey in Children Aged 9 to 18 Years. Optom Vis Sci. 2003;80(12):832–838.
For clinical reference only. A score above 15 suggests convergence insufficiency but should be interpreted alongside a full binocular vision examination.

Adapted from: Borsting et al. Validity and Reliability of the Revised Convergence Insufficiency Symptom Survey in Children Aged 9-18 Years. Optometry and Vision Science 2003;80(12):832-838