Why Would Worms Appear in Eyes?

The sensation of insects in the eyes is a symptomatic manifestation. It does not literally mean that there are insects growing in the eyes, but rather a feeling of insects flying in front of the eyes. This condition is medically known as myodesopsia, also called vitreous opacity. There are various reasons for this condition, most of which are physiological, such as high myopia, age-related factors, vascular degeneration, etc. However, it is also necessary to be vigilant about the pathological causes of myodesopsia.

Let's take a closer look at what causes the sensation of insects in the eyes. 1. The sensation of insects in the eyes is actually myodesopsia, also known as vitreous opacity. It is caused by the degeneration and metaplasia of the vitreous body and is commonly seen in patients with high myopia, age-related vascular degeneration, and some endocrine diseases such as hyperlipidemia and hyperglycemia. Myodesopsia can lead to the perception of floating dark shadows in front of the eyes. If there is no impact on vision, it is generally considered physiological myodesopsia and does not require special treatment. Relaxing the mindset and taking lecithin iodine complex may help. However, if there is a decline in vision, it is necessary to undergo fundus examination to rule out fundus diseases.

2. About 80% of myodesopsia cases are considered "good flies". Myodesopsia often occurs in middle-aged and elderly people over 40 years old, patients with high myopia, and those who have undergone cataract surgery. Other conditions such as intraocular inflammation or retinal vascular disease can also lead to this condition. Most cases of myodesopsia are benign, also known as "physiological myodesopsia" or "good flies". Only a minority of cases pose a serious threat to the eyeball, which are considered "bad flies". Experts believe that approximately 80% of myodesopsia cases are caused by the hydration of vitreous fibers, which is considered benign. The characteristics of "good flies" are as follows: if both eyes have the sensation of flies and it is difficult to determine which eye is affected, and if these symptoms do not worsen or change over time and the position of the flies remains fixed, it is most likely benign.

3. On the contrary, if the sensation of flies occurs suddenly and is limited to one eye, with the flies moving in unpredictable directions, causing dark shadows to obscure the field of vision and leading to decreased vision and visual field defects, these are ominous signs that require immediate attention. The "bad flies" that pose a serious threat to the eyeball are generally caused by severe diseases affecting the retina, optic nerve, ciliary body, and other structures near the vitreous body, leading to vitreous degeneration.