A system comprising: • an intraocular lens blank; • a first mounting material; • a second mounting material; and • a mandrel for holding an intraocular lens blank during manufacturing, the mandrel comprising: an intraocular lens holding section configured to hold an intraocular lens, the intraocular lens holding section including: a central cavity configured to hold the first mounting material such that the first mounting material contacts an optic of the intraocular lens blank when the intraocular lens blank is mounted on the mandrel, a first projection extending around a periphery of the central cavity, the first projection having an outer wall and an inner wall, and the first projection being configured such that, when the intraocular lens blank is mounted on the mandrel, an outer peripheral edge of the intraocular lens blank extends up to or beyond the first projection, a first trench located between the outer wall of the first projection and an outer periphery of the mandrel, wherein the first trench is configured to hold the second mounting material such that a second mounting material contacts the intraocular lens blank at a periphery of the intraocular lens blank when the intraocular lens blank is mounted on the mandrel, and a second trench located between the periphery of the central cavity and the inner wall of the first projection. • an intraocular lens blank; • a first mounting material; • a second mounting material; and • a mandrel for holding an intraocular lens blank during manufacturing, the mandrel comprising: an intraocular lens holding section configured to hold an intraocular lens, the intraocular lens holding section including: a central cavity configured to hold the first mounting material such that the first mounting material contacts an optic of the intraocular lens blank when the intraocular lens blank is mounted on the mandrel, a first projection extending around a periphery of the central cavity, the first projection having an outer wall and an inner wall, and the first projection being configured such that, when the intraocular lens blank is mounted on the mandrel, an outer peripheral edge of the intraocular lens blank extends up to or beyond the first projection, a first trench located between the outer wall of the first projection and an outer periphery of the mandrel, wherein the first trench is configured to hold the second mounting material such that a second mounting material contacts the intraocular lens blank at a periphery of the intraocular lens blank when the intraocular lens blank is mounted on the mandrel, and a second trench located between the periphery of the central cavity and the inner wall of the first projection. a central cavity configured to hold the first mounting material such that the first mounting material contacts an optic of the intraocular lens blank when the intraocular lens blank is mounted on the mandrel, a first projection extending around a periphery of the central cavity, the first projection having an outer wall and an inner wall, and the first projection being configured such that, when the intraocular lens blank is mounted on the mandrel, an outer peripheral edge of the intraocular lens blank extends up to or beyond the first projection, a first trench located between the outer wall of the first projection and an outer periphery of the mandrel, wherein the first trench is configured to hold the second mounting material such that a second mounting material contacts the intraocular lens blank at a periphery of the intraocular lens blank when the intraocular lens blank is mounted on the mandrel, and a second trench located between the periphery of the central cavity and the inner wall of the first projection.