A soft foldable intraocular lens, comprising: an optical part defining a central axis that extends in an anterior-posterior direction and an optical part outer boundary; first and second supporting parts outside of the optical part for holding the optical part in an eye; each supporting part defining a width (Ws) over at least a portion thereof and having a support part tip and a support part root; and first and second transition parts, each transition part defining a respective radially inner boundary that is coincident with a respective portion of the optical part outer boundary and each transition part defining a respective radially outer boundary that is radially spaced from that transition part's radially inner boundary and is coincident with a respective one of the first and second _ supporting parts roots, the radially outer boundary of each transition part defining a mid-point, and each transition part defining a width that continuously increases from the width (Ws) at the radially outer boundary to a width at the radially inner boundary and also defining a width (Wm) at the radial mid-point between the radially inner boundary and the radially outer boundary; wherein the width (Ws), width and width (Wm) extend in respective directions that are perpendicular to the anterior-posterior direction; wherein the optical part, the first and second transition parts, and the first and second supporting parts are integrally formed and made of the same material, with IRHD hardness thereof being 40 to 60, characterized in that for the first and second supporting parts and the first and second transition parts, a reference point is located at the mid-point of the radially outer boundary of the transition part, a distance, measured along a straight line, from the optical part central axis to the reference point is in a range of 3.75mm - 4.50mm, an angle (θ) about the central axis from the tip of the supporting part to the reference point is in a range of 35° - 50°, and the transition part radial mid-point width (Wm) is 1.5 times to 3 times of the supporting part width (Ws). an optical part defining a central axis that extends in an anterior-posterior direction and an optical part outer boundary; first and second supporting parts outside of the optical part for holding the optical part in an eye; each supporting part defining a width (Ws) over at least a portion thereof and having a support part tip and a support part root; and first and second transition parts, each transition part defining a respective radially inner boundary that is coincident with a respective portion of the optical part outer boundary and each transition part defining a respective radially outer boundary that is radially spaced from that transition part's radially inner boundary and is coincident with a respective one of the first and second _ supporting parts roots, the radially outer boundary of each transition part defining a mid-point, and each transition part defining a width that continuously increases from the width (Ws) at the radially outer boundary to a width at the radially inner boundary and also defining a width (Wm) at the radial mid-point between the radially inner boundary and the radially outer boundary; wherein the width (Ws), width and width (Wm) extend in respective directions that are perpendicular to the anterior-posterior direction; wherein the optical part, the first and second transition parts, and the first and second supporting parts are integrally formed and made of the same material, with IRHD hardness thereof being 40 to 60, characterized in that for the first and second supporting parts and the first and second transition parts, a reference point is located at the mid-point of the radially outer boundary of the transition part, a distance, measured along a straight line, from the optical part central axis to the reference point is in a range of 3.75mm - 4.50mm, an angle (θ) about the central axis from the tip of the supporting part to the reference point is in a range of 35° - 50°, and the transition part radial mid-point width (Wm) is 1.5 times to 3 times of the supporting part width (Ws).