A microsurgical instrument for illuminating an interior site includes an optical fiber having a length between opposed proximal and distal ends, wherein the proximal end of the optical fiber is configured for operative engagement with an illumination light source, the distal end of the optical fiber including a light emitting portion, a preformed curved portion of the optical fiber proximate to the distal end, wherein the curved portion has a predetermined bend or curve, a flexible tubular sleeve enclosing at least a portion of the optical fiber, wherein the tubular sleeve has a preformed curved portion corresponding to the curved portion of the optical fiber.