Can hyperopia cause astigmatism?

Aug 24, 2022 Source: Cainiu Health

Dr. Chen You

Introduction

Hyperopia may lead to astigmatism. Hyperopia is further categorized into physiological and pathological causes and is classified as refractive hyperopia. It can result from numerous factors, such as improper sitting posture and excessive eye strain, and may also be inherited from parents. However, abnormal axial length of the eye or reduced corneal curvature during childhood development cannot be ruled out as potential causes of hyperopia.

Hyperopic astigmatism is closely associated with many unhealthy lifestyle habits. In particular, with the rapid advancement of science and technology, hyperopic astigmatism significantly impacts daily life—making it essential to learn how to use our eyes scientifically in everyday activities. So, can hyperopia cause astigmatism?

Can hyperopia cause astigmatism?

Yes, hyperopia may lead to astigmatism. Hyperopia itself can be categorized into physiological and pathological types and is classified as a refractive error. It arises from multiple factors—including poor posture, excessive eye strain, and even genetic inheritance from parents. Additionally, abnormal axial length development or reduced corneal curvature during childhood cannot be ruled out as potential causes of hyperopia. Similarly, incorrect posture, prolonged visual strain, and incomplete ocular development may all contribute to astigmatism. Astigmatism commonly manifests as strabismus or eye fatigue and represents another form of refractive error—characterized by an inability to focus light onto a single point on the retina, resulting in blurred or distorted vision.

First and foremost, patients must maintain proper posture. During work or study, adopt a correct and comfortable sitting position, aligning the center of your computer screen or book at approximately chest level. Maintain a viewing distance of about 40 cm between your eyes and the screen or reading material, and preferably use an adjustable-height chair. While working, consciously blink frequently or close your eyes periodically for brief rest periods. Avoid prolonged near-vision tasks—limit such activities to no more than one hour at a time to minimize ocular strain.

In daily life, maintain a balanced diet—avoid spicy, irritating foods and overeating, and refrain from staying up late. We hope this information proves helpful.

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Is hyperopic astigmatism hereditary?

Hyperopic astigmatism of the eye is hereditary. If both parents have severe hyperopic astigmatism, their child may also have a smaller eyeball, resulting in more pronounced hyperopia. In fact, individuals are born with some degree of hyperopia. As children develop, the eyeball gradually increases in size, and the hyperopic refractive state progressively normalizes.

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How to prescribe glasses for hyperopia combined with astigmatism of −4.00 D?

If hyperopia and astigmatism occur during childhood, a thorough ophthalmic examination must be conducted at a hospital, including visual acuity testing, slit-lamp examination, refraction testing, and fundus examination. If the child has amblyopia—and other causes of amblyopia have been ruled out—cycloplegic refraction using atropine and subsequent refraction testing must be repeated. Following cycloplegia, the measured degree of hyperopia typically decreases by approximately 100–150 degrees.

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Which is more severe: astigmatism or hyperopia?

Astigmatism and hyperopia are both refractive errors. Due to differences in associated complications and severity, it is not possible to determine which condition is more serious. Astigmatism and hyperopia each carry their own clinical significance. If the degrees of astigmatism and hyperopia are relatively mild, they typically cause no significant visual impairment and are considered comparatively benign. Conversely, if both conditions are relatively severe and accompanied by related complications, symptoms become more pronounced and debilitating.

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Is it possible for myopia to become hyperopia?

Myopia does not transform into hyperopia. Myopia results from refractive abnormalities of the eye caused by various factors, leading light entering the eye to focus in front of the retina. Improved visual correction can be achieved through corrective lenses or refractive surgery for myopia. Myopia is classified into axial myopia and refractive myopia. The longer the axial length of the eye and the steeper the cornea, the higher the degree of myopia.