Vitreous Opacities, Vitreous Floaters, and Mouches volantes – Causes, Symptoms, and Treatment - When Should You Be Concerned About a Vitreous Detachment?

The vitreous humor is a part of the eye. It fills the eyeball and provides the necessary pressure to prevent the eyeball from collapsing.

Light entering through the pupil passes through the vitreous humor and strikes the retina at the back of the eye. Therefore, the vitreous humor must be transparent. Consequently, it consists almost entirely of water. In addition, the vitreous body also contains collagen and hyaluronic acid, albeit in much lower concentrations.

The composition of the vitreous humor is strictly organized. If this order is disrupted, vitreous opacity develops, with symptoms that can impair vision. Vitreous opacity is harmless in itself, but it can still affect a person’s quality of life.

Older people are most commonly affected, as vitreous opacity is a consequence of the natural aging process. Nevertheless, younger people can also suffer from vitreous opacity. People who are nearsighted are particularly prone to it.

The vitreous body fills the eyeball and provides the necessary pressure. However, vitreous opacity can impair vision © Axel Kock | AdobeStock

Vitreous opacities are a painless condition. The person affected perceives a haze or dark spots in front of their eyes that seem to dance around.

These symptoms worsen when the person

• looks at a bright wall,
• are out in the snow, or
• are dazzled by bright light.

The streaks and spots perceived are not a figment of the brain’s imagination: they actually exist in the vitreous humor.

If a vitreous opacity is suspected, a visit to an ophthalmologist is necessary. The doctor must first rule out other eye conditions. To do this, he or she will ask the patient a few questions. For example, the doctor will ask when the patient first noticed these symptoms and exactly how they manifest. In addition, the doctor will also ask the patient about other medical conditions that may not necessarily be related to the eye.

As part of the diagnostic process, the specialist will perform a thorough examination of the eye. Before the examination, the patient is first given eye drops. During the slit-lamp examination, the doctor shines a bright light into the patient’s eye. If there is a vitreous opacity, a dark spot or shadow can then be seen in the eye.

However, if the suspicion is not confirmed, additional tests are advisable. For example, an ultrasound examination of the eye can determine whether there is damage to the retina. Other imaging techniques such as

• X-rays,
• CT, or
• MRI

can determine whether there are foreign bodies in the eye and where they are located.

Medical opinions sometimes differ slightly regarding treatment.

As a rule, vitreous opacities do not require any special treatment. Instead, patients are given some practical advice on how to make the streaks less noticeable. Since streaks and spots are particularly noticeable against a bright background, it helps to minimize this:

• In snowy conditions or bright light, sunglasses with a high UV protection factor are helpful.
• Colored decorative items, walls, and furniture can help if the home has too many white walls or pieces of furniture.
• People who work on a computer can lower the brightness of their monitor slightly.

Many doctors also recommend not focusing too much on the symptoms, but rather ignoring them as much as possible.

However, there are also doctors and eye clinics that offer surgical treatments. These include, for example, the surgical removal of the vitreous humor, which is then replaced with a saline solution.

This surgery is frequently criticized, however, because the associated risks are quite high. For example, it can lead to infections or retinal damage. In the worst-case scenario, the patient could even face blindness. Cataracts are also among the risks associated with such surgery.

Some doctors also perform laser treatments. Opinions on this vary as well. Not every form of vitreous opacity can be successfully treated this way.

Vitreous opacity in the eye is a common condition that develops over the course of a person’s life as a result of the aging process. During this process, the vitreous humor—an originally transparent, gel-like substance—shrinks, causing collagen fibers to condense and become visible as opacities in the vitreous humor. These so-called “mouches volantes” or “floaters” often appear in the field of vision as specks or “flies” and are particularly noticeable against a bright background or when looking at a white wall.

In most cases, floaters are harmless and painless, so there is no immediate cause for concern. Nevertheless, symptoms of vitreous opacities should be taken seriously, especially if new particles, flashes of light, or changes in vision suddenly occur. Such changes inside the eye may indicate a posterior vitreous detachment or, in rare cases, a retinal tear or detachment, which increases the risk of retinal detachment.

The occurrence of vitreous opacities is closely linked to aging, as the vitreous body changes over the course of a person’s life and the gel-like substance loses its structure. As a result, particles can cast shadows on the retina and impair vision. It is particularly important to consult an ophthalmologist for an evaluation in order to detect possible damage to the retina or other eye diseases at an early stage and, if necessary, to prevent retinal detachment.

Only in rare cases is treatment such as vitrectomy—performed as part of retinal surgery—necessary. The goal is to allow light to reach the retina unimpeded again and to reduce the disruptive opacities. Overall, the following applies: Changes in the vitreous body, particularly vitreous detachment, should be monitored—an early visit to an ophthalmologist is crucial to protect the health of the lens and retina and to maintain stable vision in the long term.

What is a vitreous opacity?
A vitreous opacity is caused by cloudiness in the vitreous humor that casts small shadows on the retina. These are perceived as “mouches volantes” or floaters and often appear like flying gnats in the field of vision.

Are vitreous opacities dangerous?
In most cases, vitreous opacities are harmless. However, you should see an ophthalmologist, especially if you also experience flashes of light, as this can be a symptom of retinal detachment.

What are the symptoms of vitreous opacities?
Typical symptoms of vitreous opacities include moving spots, threads, or a “fly” in the field of vision. These are particularly visible against a bright background, such as a white wall, and can be perceived as distracting when looking at objects.

How are vitreous opacities treated?
Treatment is usually not necessary. In rare cases, a procedure such as a vitrectomy or laser treatment may be performed if the opacities cause significant discomfort or impair vision.

When should you see an ophthalmologist?
It is advisable to see an ophthalmologist if vitreous opacities suddenly increase, new symptoms appear, or you see flashes of light. This may indicate damage to the retina or a retinal tear.