Floaters.– those drifting shapes or shadows in your vision – can be a common and often harmless symptom. However, in some cases, they may be caused by a posterior vitreous detachment (PVD), a condition that can occasionally lead to retinal tears or detachment.
At the ELZA Institute in Zurich, we offer expert evaluation and imaging to determine the cause of floaters and ensure that no vision-threatening complications are present. Early diagnosis is key to protecting your sight.
The vitreous is a clear, gel-like substance that fills the middle of the eye and helps maintain its shape. It is attached to the retina – the light-sensitive tissue lining the back of the eye. As we age, the vitreous gradually becomes more liquefied and may pull away from the retina.
This separation is called a posterior vitreous detachment (PVD), and it is a common process after the age of 50.
Floaters appear as small dots, squiggles, threads, or cobweb-like shadows in your vision. They are usually caused by clumps of collagen fibers within the vitreous casting shadows on the retina. Floaters are most noticeable against bright backgrounds (e.g., reading a white page or looking at the sky).
They are often harmless, especially when they develop gradually. However, a sudden appearance of floaters – especially when accompanied by light flashes – may indicate a vitreous detachment or retinal tear.
PVD occurs when the vitreous gel separates from the retina. In most cases, this is a benign and natural part of aging. However, during the detachment, the vitreous can tug on the retina. In some individuals, this may cause:
For this reason, a sudden onset of floaters or flashing lights should be evaluated promptly by an ophthalmologist.
Floaters explained
You should schedule an eye examination urgently if you experience:
At ELZA, we use dilated eye exams, ultrasound, and high-resolution OCT imaging to assess the vitreous and retina. If a tear or detachment is found, immediate treatment – such as laser therapy or surgery – may be required.
In most cases, floaters fade over time and become less noticeable. If they persist and interfere significantly with vision, vitrectomy (a surgical procedure to remove the vitreous gel) may be considered. This is reserved for select cases where floaters cause major visual disturbance and have not improved over time.
At ELZA, we focus on accurate diagnosis and monitoring. We will discuss whether treatment is necessary based on the type, number, and impact of your floaters.
High-resolution diagnostics to detect even subtle signs of retinal traction or tears
Immediate access to treatment if complications such as retinal tears or detachment are detected
Retina care directed by Dr. Andrea Oleñik Memmel, with advanced training in medical and surgical retina
Not all floaters require treatment – our team helps you understand your risks and next steps
If you’ve noticed new floaters, flashes of light, or changes in your vision, don’t ignore the symptoms. Book a consultation at the ELZA Institute to rule out retinal complications and protect your long-term vision.
Early diagnosis can prevent serious vision loss. Contact us today.
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