10 Surgical apparatus and instruments for use in ophthalmic surgery, namely, vitreoretinal surgery; surgical apparatus and instruments for use in ophthalmic surgery, namely, phacoemulsification and vitreoretinal surgery; fluid gateway for controlling liquid and gas pressure in both flow directions sold integral with surgical apparatus and instruments for use in ophthalmic surgery, namely, vitreoretinal surgery; fluid gateway for controlling liquid and gas pressure in both flow directions sold integral with surgical apparatus and instruments for use in ophthalmic surgery, namely, phacoemulsification and vitreoretinal surgery