Dropless cataract surgery involves a transzonular delivery of a medication called TriMoxi. TriMoxi is compounded, preservative-free triamcinolone acetone and moxifloxacin. It is designed to be delivered to the posterior chamber, directly into the vitreous. After the intraocular lens implant is in place during cataract surgery, and prior to removing viscoelastic, the surgeon will pass a canula through the corneal incision site, over the anterior capsule, underneath the iris, and then penetrate the zonules into the anterior vitreous and inject the medication into the vitreous itself.