The Convergence Insufficiency Symptom Survey (CISS) is a valid and reliable tool for assessing convergence insufficiency (CI) symptoms in presbyopic adults, according to a study. However, its multidimensional nature suggests that it should be complemented with objective clinical tests for a more comprehensive evaluation.
Researchers assessed 100 adult patients with normal binocular vision (n = 50) or CI (n = 50). The Persian-translated CISS was administered twice over a 7–14-day period, and participants underwent vision tests, including refraction, cover test, near point of convergence, and fusional range measurements.
Significantly higher CISS scores were found in the CI group (19.24 ± 5.33) compared to the normal group (13.26 ± 3.53, P < 0.001). A cutoff score of 15 effectively distinguished CI, with a sensitivity of 72% and specificity of 69%. The CISS demonstrated strong internal consistency and excellent test-retest reliability (ICC = 0.91). Rasch analysis confirmed good model fit and measurement precision, though multidimensionality was observed, with headaches reported more frequently in the CI group.
Reference
Abdi S, Kangari H, Rahmani S, et al. Is the convergence insufficiency symptom survey applicable to elderly individuals? BMC Ophthalmol. 2025;25(1):28. doi: 10.1186/s12886-025-03857-8. PMID: 39825318; PMCID: PMC11742225.
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