"What Are the Differences Between Astigmatism and Myopia?"

Differences Between Astigmatism and Myopia

The distinction between astigmatism and myopia lies in their different definitions, causes, symptoms, and treatment methods.

1. Different Definitions

Astigmatism refers to the condition where the optical power of the eye varies along different meridians, causing parallel light rays to refract into two focal lines instead of a single point. In contrast, myopia is a state where parallel light rays entering the eye are focused in front of the retina.

2. Different Causes

The exact cause of astigmatism is unclear, but it may be related to uneven corneal curvature or abnormal changes in refractive media such as the lens or vitreous humor. Myopia, on the other hand, is typically caused by genetic factors and poor visual habits.

3. Different Symptoms

Patients with astigmatism often experience blurred vision and visual fatigue, with severe cases accompanied by headaches and nausea. Myopia patients typically see near objects clearly but have difficulty seeing distant ones, and some may develop symptoms like squinting or tilted head posture.

4. Different Treatment Methods

Astigmatism can be corrected through wearing spectacles, contact lenses, or undergoing laser surgery. Myopia can also be corrected with spectacles or contact lenses, and in severe cases, may require full-laser or half-laser surgery.

It is recommended to cultivate good visual habits, avoid prolonged use of electronic devices, and seek prompt medical attention if symptoms arise. Treatment should be guided by medical professionals to ensure proper management and prevent disease progression.