A surgical retractor (1700, 2600), the surgical retractor comprising: a first component (100, 2300) including a first top ring structure (102, 2302) and an outer wall (114, 2316), the first top ring structure having a first opening (112, 2314), the outer wall extending below the first top ring structure, and a second component (600, 2400) including a second top structure (602, 2402) and an inner wall (612, 2416), the second top structure having a third opening (608, 2412), the second top structure of the second component (600, 2400) being disposed inside the first top ring structure (102, 2302) of the first component (100, 2300) such that the second component (600, 2400) is rotatably adjustable with respect to the first component (100, 2300) from a first rotational configuration to a second rotational configuration, characterized in that: the outer wall (114, 2316) is conically shaped, the conically shaped outer wall forming a second opening (208, 2330) in communication with the first opening (112, 2314), the second opening defined by an ellipse shaped arch (120, 2318) that connects to an arcuate bottom (206, 2328) of the conically shaped outer wall; the inner wall (612, 2416) is conically shaped, the conically shaped inner wall forming a fourth opening (708, 2430) in communication with the third opening (608, 2412), the fourth opening defined by an ellipse shaped arch (620, 2418) that connects to an arcuate bottom (706, 2428) of the conically shaped inner wall; and wherein the second top structure is disposed at least partially inside the first opening of the first component (100, 2300) such that the second component (600, 2400) is rotatably adjustable with respect to the first component (100, 2300) from the first rotational configuration to the second rotational configuration in which the second opening (208, 2330) and the fourth opening (708, 2430) define a combined opening (2006, 2104, 2806, 2904) that is in communication with the third opening (608, 2412) to provide an expanded field of vision (2004, 2102, 2804, 2904). a first component (100, 2300) including a first top ring structure (102, 2302) and an outer wall (114, 2316), the first top ring structure having a first opening (112, 2314), the outer wall extending below the first top ring structure, and a second component (600, 2400) including a second top structure (602, 2402) and an inner wall (612, 2416), the second top structure having a third opening (608, 2412), the second top structure of the second component (600, 2400) being disposed inside the first top ring structure (102, 2302) of the first component (100, 2300) such that the second component (600, 2400) is rotatably adjustable with respect to the first component (100, 2300) from a first rotational configuration to a second rotational configuration, characterized in that: the outer wall (114, 2316) is conically shaped, the conically shaped outer wall forming a second opening (208, 2330) in communication with the first opening (112, 2314), the second opening defined by an ellipse shaped arch (120, 2318) that connects to an arcuate bottom (206, 2328) of the conically shaped outer wall; the inner wall (612, 2416) is conically shaped, the conically shaped inner wall forming a fourth opening (708, 2430) in communication with the third opening (608, 2412), the fourth opening defined by an ellipse shaped arch (620, 2418) that connects to an arcuate bottom (706, 2428) of the conically shaped inner wall; and wherein the second top structure is disposed at least partially inside the first opening of the first component (100, 2300) such that the second component (600, 2400) is rotatably adjustable with respect to the first component (100, 2300) from the first rotational configuration to the second rotational configuration in which the second opening (208, 2330) and the fourth opening (708, 2430) define a combined opening (2006, 2104, 2806, 2904) that is in communication with the third opening (608, 2412) to provide an expanded field of vision (2004, 2102, 2804, 2904). the outer wall (114, 2316) is conically shaped, the conically shaped outer wall forming a second opening (208, 2330) in communication with the first opening (112, 2314), the second opening defined by an ellipse shaped arch (120, 2318) that connects to an arcuate bottom (206, 2328) of the conically shaped outer wall; the inner wall (612, 2416) is conically shaped, the conically shaped inner wall forming a fourth opening (708, 2430) in communication with the third opening (608, 2412), the fourth opening defined by an ellipse shaped arch (620, 2418) that connects to an arcuate bottom (706, 2428) of the conically shaped inner wall; and wherein the second top structure is disposed at least partially inside the first opening of the first component (100, 2300) such that the second component (600, 2400) is rotatably adjustable with respect to the first component (100, 2300) from the first rotational configuration to the second rotational configuration in which the second opening (208, 2330) and the fourth opening (708, 2430) define a combined opening (2006, 2104, 2806, 2904) that is in communication with the third opening (608, 2412) to provide an expanded field of vision (2004, 2102, 2804, 2904).