Surgical Keratometer is used in the surgery related to human cornea. Human cornea is optical component face the external contact of light that penetrates the eye. It is the cornea that decides the shape and physical structure of the object observed by the human eye. Latest kind of Surgical Keratometer is Handheld Keratometer. However, some doubts the reliability of the product but that may incorrect one must know the exact distance from where the Keratometer has to hold from cornea without influencing the shape and image as elliptical image can appear more circular when Keratometer is held closer.