A modular retractor, comprising: a first annular retainer and a second annular retainer, the first annular retainer defining a first center point and the second annular retainer defining a second center point; a central axis (C-C) projecting through the first center point and the second center point; a plurality of primary blades, the plurality of primary blades being coupled to the first annular retainer, each primary blade of the plurality of primary blades being configured to pivotally couple to an adjacent primary blade of the plurality of primary blades; a handle; and a contraction mechanism operably coupled to the first annular retainer, the contraction mechanism being configured to cause radial contraction of the first annular retainer by pulling at least one end portion of the first annular retainer within a cavity of the handle, wherein the first annular retainer and the second annular retainer are arranged at a proximal portion of the primary blades; wherein the first annular retainer is configured to radially contract towards the first center point when sliding the contraction mechanism towards a distal side of handle such that each primary blade of the plurality of primary blades articulates outwardly at a distal end of the primary blades with respect to the central axis (C-C), thereby moving the modular retractor from the closed position to an open position; wherein, in the closed position, the second annular retainer circumscribes the outside of the plurality of primary blades; and wherein the second annular retainer is of an elastic or semi-elastic-material to be thereby configured to apply a biasing force against each primary blade of the plurality of primary blades towards the central axis (C-C). a first annular retainer and a second annular retainer, the first annular retainer defining a first center point and the second annular retainer defining a second center point; a central axis (C-C) projecting through the first center point and the second center point; a plurality of primary blades, the plurality of primary blades being coupled to the first annular retainer, each primary blade of the plurality of primary blades being configured to pivotally couple to an adjacent primary blade of the plurality of primary blades; a handle; and a contraction mechanism operably coupled to the first annular retainer, the contraction mechanism being configured to cause radial contraction of the first annular retainer by pulling at least one end portion of the first annular retainer within a cavity of the handle, wherein the first annular retainer and the second annular retainer are arranged at a proximal portion of the primary blades; wherein the first annular retainer is configured to radially contract towards the first center point when sliding the contraction mechanism towards a distal side of handle such that each primary blade of the plurality of primary blades articulates outwardly at a distal end of the primary blades with respect to the central axis (C-C), thereby moving the modular retractor from the closed position to an open position; wherein, in the closed position, the second annular retainer circumscribes the outside of the plurality of primary blades; and wherein the second annular retainer is of an elastic or semi-elastic-material to be thereby configured to apply a biasing force against each primary blade of the plurality of primary blades towards the central axis (C-C).