Measurements of the eye axis while wearing keratoconus are not accurate and are more accurate when the cornea has fully recovered. Axis length is generally defined as the distance from the apex of the cornea to the retina. During the period of wearing keratoplasty lenses, a certain amount of pressure will be exerted on the cornea, causing the cornea to flatten, the curvature of the cornea decreases, and the distance between the apex of the cornea and the retina decreases, and at this time, the accuracy of the axial length of the eye as measured by the optical equipment is relatively poorer. Therefore, if the patient needs to measure the eye axis after wearing keratoplasty lenses, it is recommended that the patient stops wearing the lenses for a period of time and then measure the eye axis again, so as to obtain more accurate data. Measurement of eye axis length is important for myopia prevention and control, and patients with high myopia should have their eye axis length measured by a professional organization on a regular basis. Patients who experience discomfort with contact lenses are advised to seek prompt medical attention to assess their condition and follow the doctor’s instructions.