👉 The term "keratometric" is a mathematical concept used in optics to describe the relationship between an object's scale and its actual size. It refers to the ratio of the image size to the real-world size, which can be expressed as a measurement called the "kernal diameter." The kernal diameter is defined as the distance from the center of curvature of the lens to the edge of the image. This relationship allows for precise measurements and calculations in various applications such as optical instruments and computer
