A contact lens having a lens edge defining an outer periphery of the contact lens, an optic zone positioned within the lens edge designed to provide corrective vision for a patient, a Lens Center having a vertical axis and a horizontal axis passing therethrough, and first and second fiducial indicators present at first and second different locations around the lens edge. The first and second fiducial indicators each include at least one recess into or at least one projection extending outwardly from the lens edge and are different from one another.本發明揭示一種隱形眼鏡，其具有：一鏡片邊緣，該邊緣界定該隱形眼鏡的一外周邊；一光學區，其被定位在該鏡片邊緣之內，設計成提供一患者矯正視力；一鏡片中心，其具有通過其間的一垂直軸以及一水平軸；以及第一和第二基準指示器，其等存在於該鏡片邊緣周圍的第一和第二不同位置處。該第一和第二基準指示器各包括凹入該鏡片邊緣的至少一凹部或從該鏡片邊緣往外延伸的至少一突出部，並且係彼此不同。
