Immediate Anterior Chamber Paracentesis With A 30-Gauge Needle for Acute Primary Angle - Closure

Inclusion Criteria: * patients aged more than 18 year old with the first attack of APAC * IOP of more than or equal to 40 mmHg. Exclusion Criteria: * patient unable to cooperate for paracentesis * patients with APAC in the only remaining eye * patients received any glaucoma treatments prior to the study * patients with secondary causes of acute angle closure * patients with intraocular inflammation or infection; (6) patients with APAC in the eye with a history of previous intraocular surgery * patients known hypersensitive to tetracaine hydrochloride or tobramycin.