What causes vision loss?

Due to "mobile phones in hand and people looking down everywhere", vision loss has become a common phenomenon. At present, myopia accounts for a very large proportion of the population, and its number is increasing year by year.

The causes of vision decline are complex and often not due to a single factor but rather the combined effect of multiple factors. Vision loss in the elderly is a result of normal cellular aging, with most seniors suffering from presbyopia. In other groups, as myopia progresses slowly, issues such as blurred vision may gradually arise. Generally, genetic factors, overuse of eyes, overly bright or dim lighting environments, and nutritional deficiencies can all lead to myopia. Some surgeries and external impacts also pose risks of vision decline or even blindness.

If myopia leads to vision decline, it is essential to wear glasses as soon as possible. Although the progression of myopia is relatively slow, once vision becomes unclear, people often unconsciously squint their eyes, which further increases the burden on the lens's accommodation. If one does not promptly wear glasses or contact lenses with the correct prescription, vision will continue to deteriorate. Severe myopia can also cause the eyeball to deform and protrude, affecting both life quality and appearance.

In addition, some diseases can cause a significant decline in vision over a short period, which must be promptly identified and treated. For example, eye conditions such as glaucoma, keratitis, and cataracts, or diseases like hypertension, diabetes, and hyperthyroidism can all lead to eye disorders, often accompanied by symptoms such as eye pain, photophobia, and itching.

Whether it's teenagers or middle-aged and elderly people, a sudden decline in vision is definitely abnormal. Therefore, regular eye exams every year are crucial to promptly identify various issues within the eyes. During vision tests, procedures such as intraocular pressure measurement, fundus examination, tear secretion testing, and slit-lamp examination may be conducted. If necessary, doctors may also use dilated eye examinations. However, when it comes to vision problems, prevention is more important than treatment, especially for minors. Due to the longer development period and greater eye strain, it is essential to take this seriously, address issues promptly, develop good eye habits, and pay attention to eye hygiene!