Retrospective Study of Vitreous Tap Technique Using Needle Aspiration for Management of Shallow Anterior Chamber during Phacoemulsification

Purpose. To evaluate the technique of vitreous tap using needle aspiration for management of anterior chamber shallowness during phacoemulsification. Methods. A retrospective study included 26 eyes of 17 patients who underwent phacoemulsification in which vitreous tap was performed using a 27-gauge needle attached to a 5 ml syringe, inserted 3.5 mm from the limbus to aspirate 0.2 ml of liquefied vitreous if a cohesive (OVD) failed to sufficiently deepen the anterior chamber. Results. Preoperative anterior chamber depth was 2.31 +/- 0.26 mm, axial length was 21.7 +/- 0.67 mm, lens thickness was 4.5 +/- 19 mm, and cataract grade was 3.77 +/- 1.4. Preoperative CDVA in LogMAR units was 0.98 +/- 0.75. Coexisting angle closure glaucoma was present in 7 patients (26.92%) preoperatively. Vitreous needle tap was successful in vitreous removal on the first attempt in 26 eyes (100%). Postoperative follow-up period was 22.88 +/- 10.24 (4-39) months. The final postoperative CDVA in LogMAR units was 0.07 +/- 0.1, while the final postoperative IOP was 16.54 +/- 1.45 mmHg. No complications related to vitreous tap were noted. Conclusion. Vitreous needle tap is a simple, cost-effective, and safe technique for management of shallow anterior chamber in phacoemulsification.