Abstract: According to a first aspect, a phakic intraocular lens (PIOL) is suitable for implantation between the iris and the natural lens in an eye. The PIOL allows for fluid circulation between its posterior and the anterior of said natural lens after implantation. The PIOL comprises a central optic part, a peripheral haptic part, and at least one penetrating channel. The channel(s) has an anterior orifice and a posterior orifice. The channel is arranged at the border of, or outside, the central optic part. According to a second aspect, a method of preventing glaucoma associated with implantation of a phakic intraocular lens (PIOL) between the iris and the native lens in an eye comprises the step of implanting a PIOL as described.