What Is the Difference Between Astigmatism and Myopia?
Jun 29, 2022
Source: Cainiu Health
Dr. Chen You
Introduction
Astigmatism and myopia are both types of refractive errors. Myopia is typically caused by poor eye habits or genetic factors, resulting in blurred vision when viewing distant objects. Astigmatism arises from an irregularly shaped cornea, leading to decreased visual acuity; objects may appear distorted when viewed. The treatment approaches for both conditions are largely similar.
Astigmatism and myopia are common types of refractive errors. Mild astigmatism and myopia have minimal impact on vision; however, without proper correction and management, these conditions may progressively worsen—developing into moderate or high astigmatism and myopia. This not only impairs visual acuity but also adversely affects daily life and work performance. So, what distinguishes astigmatism from myopia?
What Is the Difference Between Astigmatism and Myopia?
Both astigmatism and myopia fall under the category of refractive errors. Myopia typically arises from poor visual habits or genetic factors, resulting in blurred distance vision. In contrast, astigmatism stems from an irregularly shaped cornea, causing distorted or blurred vision at all distances—objects may appear stretched or skewed. Treatment approaches for both conditions are largely similar: after reaching adulthood, corrective options include spectacles, contact lenses, or refractive surgery to improve visual acuity.
Beyond these three standard interventions, no other methods can reduce or fully eliminate myopia or astigmatism. Early refraction testing is essential once myopia or astigmatism develops. A tailored treatment plan should be determined based on the severity of the condition—delaying evaluation or treatment is not advisable. In astigmatism, both near and distance vision are typically impaired; myopia is corrected with concave spherical lenses, whereas astigmatism requires cylindrical lenses aligned along a specific axis. Patients with astigmatism commonly experience visual fatigue, while those with myopia generally tolerate visual tasks better, with comparatively milder fatigue symptoms. Myopia can be treated with laser refractive surgery.
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