There was notable inter-observer variability in GAT-based IOP measurements between residents and the senior ophthalmologist, exceeding the ±4 mmHg clinical acceptability benchmark. This variability suggests that less experienced observers may not yet have fully developed skills, impacting measurement accuracy. Over time, this range may narrow as experience and proficiency improve. Additionally, clinicians should interpret NCT results with caution-especially in postoperative assessments or when modifying treatment. Cross-checking with GAT and incorporating structured training protocols may enhance measurement consistency.
Hayat et al. (2026) studied this question.