Normal range of corneal curvature K1-K2 difference
Feb 27, 2023
Source: Cainiu Health
Dr. Cui Xin
Introduction
The normal range for the difference between corneal curvature values K1 and K2 is generally between 40 D and 46 D. Corneal curvature K1 and K2 typically refer to the curvature values in two perpendicular meridians of the cornea. If the measured difference falls below 43 D, it may lead to hyperopia, whereas a value above 46 D may result in myopia.
The normal range for the difference between corneal curvatures K1 and K2 is generally between 40D and 46D.
Under normal circumstances, the human cornea is oval-shaped, similar to a football, so the curvatures along two perpendicular meridians differ. Corneal curvatures K1 and K2 typically refer to the curvature values at two different axes on the cornea. Normally, the difference between these two values ranges from 40D to 46D. If testing reveals a difference less than 43D, it may lead to hyperopia (farsightedness), while a value greater than 46D may cause myopia (nearsightedness).
If abnormal corneal curvature is detected, it is recommended to undergo appropriate examinations under a doctor's guidance and actively seek treatment to prevent negative impacts on daily life.
