A modular retractor , comprising: a first annular retainer and a second annular retainer , the first annular retainer defining a first center point (C1) and the second annular retainer defining a second center point (C2); a central axis (C-C) projecting through the first center point (C1) and the second center point (C2); 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 (C1) 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 (C1) and the second annular retainer defining a second center point (C2); a central axis (C-C) projecting through the first center point (C1) and the second center point (C2); 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 (C1) 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). <EOS>