Zone of Zero‐Associated Phoria in Patients with Convergence Insufficiency

Key Points

• The study aims to identify how the zone of zero-associated phoria differs in patients with convergence insufficiency compared to asymptomatic individuals.
• Examined the zone of zero-associated phoria in patients with convergence insufficiency.
• Compared this zone to that of asymptomatic patients.
• Evaluated the potential diagnostic utility of ZZAP for convergence insufficiency.
• ZZAP significantly differs between patients with convergence insufficiency and asymptomatic individuals.
• ZZAP may serve as a supplemental test for identifying convergence insufficiency.
• The findings suggest a potential link between ZZAP and other binocular deficiencies.