Optical biometry is a non-invasive, accurate, and highly reliable method for determining the characteristics of the eyes. Through this method, the measurements of the length of the eyes and the dimensions of the cornea are calculated with precision. These measurements are essential for understanding eye-related procedures and the power of intraocular lens (IOL) for conducting cataract surgery or other types of refractive surgeries. The method involves light-based systems for accurately understanding the various parameters of the eyes.