Axial direction generally speaks of the direction of astigmatism in the eye, which ranges from 0 to 360 degrees, with most people’s axial direction being around 180 degrees, and a few people’s axial direction being around 90 degrees. The human eyeball is hardly ever perfectly round, most people have an oval like eyeball and therefore have astigmatism to a greater or lesser extent. Astigmatism has a direction, i.e., an axial direction, which ranges from 0 to 360 degrees. The axial direction of astigmatism in the eye is generally categorized as conformal astigmatism, retro-conformal astigmatism, and oblique-axis astigmatism, which refer to myopic astigmatism around 180 degrees, 90 degrees, and 45 degrees, respectively. Conformal astigmatism is the most common in the population, and low degrees of conformal astigmatism usually have little effect on vision, while retro-axial astigmatism and oblique axis astigmatism are less common, but have a greater effect on vision. Patients with astigmatism are advised to seek prompt medical attention to evaluate their condition and follow their doctor’s instructions.