关于近视的原因英文作文

英文回答：

Myopia, commonly known as nearsightedness, arises from a mismatch between the length of the eyeball and the refractive power of the cornea and lens. In myopia, the eyeball is elongated, causing light to focus in front of the retina instead of directly on its surface. This results in blurred vision for distant objects and clear vision for close-up objects.

The exact causes of myopia are not fully understood, but it is widely accepted that a combination of genetic and environmental factors contribute to its development. Genetics play a significant role, with a strong familial tendency for myopia. Children with parents who are nearsighted have a higher likelihood of developing the condition themselves.

Environmental factors also influence the development of

myopia. Studies have shown that prolonged near-work activities, such as reading and computer use, can increase the risk of becoming nearsighted. Spending time outdoors in natural light has been linked to a lower risk of myopia, suggesting that exposure to sunlight may have a protective effect.

中文回答：

近视的原因。

近视，俗称近视眼，是由眼球长度和角膜、晶状体的屈光力不匹配引起的。近视时，眼球长度变长，导致光线聚焦在视网膜前面而不是直接落在视网膜表面上。这导致远处物体模糊，近处物体清晰。

近视的确切原因尚不完全清楚，但普遍认为遗传和环境因素共同导致了近视的发展。遗传因素起着重要作用，近视具有很强的家族倾向。父母近视的孩子自身更容易患近视。

环境因素也影响近视的发展。研究表明，长时间近距离用眼活

动，如阅读和使用电脑，会增加近视的风险。在自然光线下户外活动与近视风险较低有关，这表明接触阳光可能有保护作用。