Vitreous degeneration was once considered a condition affecting those aged 50 and above, but it is now being found increasingly — and alarmingly — among younger working-age adults. It is truly a condition that can affect anyone, so let’s get to know it better.
The Risk of Permanent Blindness
Have you ever noticed dark shadows resembling cobwebs or floating mosquitoes drifting across your vision, only to disappear the moment you try to focus on them? They tend to be more visible against a bright sky or a white wall. Sometimes you may even see flashes of light in your eye while in a dark room.
Many people have experienced this and wondered — what is it? Is it dangerous? Could it lead to blindness? These symptoms are caused by a condition known as Vitreous Degeneration.
What Is Vitreous Degeneration?
The eye contains a clear, gel-like substance called the vitreous, which fills the back chamber of the eye and helps maintain its shape. From birth, the vitreous is thick, transparent, and firmly attached to the retina lining the inside of the eye. It is made up of 99% water, with the remainder consisting of proteins, fibers such as collagen, hyaluronic acid, and various minerals.
As we reach middle age — or sometimes earlier in certain conditions — the vitreous begins to liquefy. The tiny fibers inside clump together into cloudy deposits, and the vitreous gradually peels away from the retinal surface. This causes the appearance of dark spots, lines, or rings floating in the vision — a condition known as Posterior Vitreous Detachment (PVD).
As the vitreous pulls away from the retina, it can tug on areas where it is firmly attached, causing a retinal tear — occurring in 10–20% of patients with vitreous degeneration. This typically produces flashes of light, most noticeable in the dark. If left untreated, it can lead to retinal detachment and permanent vision loss.
What Causes Vitreous Degeneration?
- Age-related deterioration — the most common cause
- Inflammation of the vitreous and retina (intermediate and posterior uveitis) — caused by immune-related inflammation, infection, or other conditions such as cancer
- Vitreous hemorrhage — bleeding into the vitreous due to eye injury or diseases affecting the blood vessels
What Are the Risk Factors?
- Age over 50
- Short-sightedness (myopia)
- Previous eye injury
- Complications following cataract surgery
- Diabetic retinopathy
- Eye inflammation
What Should You Do If You Have Vitreous Degeneration?
Although vitreous degeneration is most commonly age-related, you should see an eye doctor as soon as you notice any unusual symptoms — particularly if you experience a sudden increase in new dark floaters, flashes of light, or a shadow or curtain partially blocking your vision. Seek urgent medical attention in these cases.
How Should You Prepare for Your Appointment?
- A vitreous and retinal examination will be performed
- The doctor will first examine the front of the eye, then administer pupil-dilating eye drops for a more detailed examination
- After the drops, expect blurred vision, light sensitivity, and difficulty focusing up close for approximately 4–6 hours
- Do not drive yourself to the appointment
- Bring sunglasses to help manage light sensitivity
How Is Vitreous Degeneration Treated?
- In most cases, no treatment is needed. Dark floaters may be bothersome but are generally harmless. Most people adapt over time, and the floaters and flashes gradually diminish and disappear.
- If a retinal tear is found, treatment with laser therapy or cryotherapy (freezing) is required to seal the tear and prevent retinal detachment.
- Any underlying eye conditions causing the degeneration should also be treated accordingly.
Source: Bangkok Health Research Center
