Look up at a clear blue sky or a white wall, and most people see them eventually: tiny squiggly lines, threads or dot-like shadows drifting across their vision. These are floaters. The good news is that almost all of them are harmless. The important thing is knowing the difference between the harmless ones and the few that are not.
What you are actually seeing
The middle of your eye is filled with a clear jelly called the vitreous humor, made mostly of water and collagen. As you get older, this jelly slowly liquefies and shrinks. The collagen fibres clump together, and those clumps cast tiny shadows on the retina (the light-sensitive back of the eye). The shadows are what you see as floaters.
You are more likely to notice them if you are short-sighted, have had an eye injury, have inflammation inside the eye (uveitis), or have had bleeding in the eye.
When floaters are dangerous
Most of the time, they are simply a sign of normal ageing. Sometimes the shrinking vitreous pulls hard enough on the retina to cause a tear or a detachment. That is a medical emergency.
Call an eye doctor immediately if you notice:
- a sudden shower of new floaters
- flashes of light, particularly off to the side of your vision
- a grey curtain or shadow moving across your sight
If any of these appear, do not wait until tomorrow.
Will they go away?
Floaters do not actually melt or dissolve. They are permanent. What does happen is that over weeks or months they tend to settle towards the bottom of the eye and out of your direct line of sight, and your brain learns to ignore them. Most people stop noticing their old floaters entirely.
Treatment options
For almost everyone, the right treatment is no treatment. There are no eye drops, vitamins or home remedies that make floaters disappear, regardless of what the internet says.
In rare cases where floaters are severe enough to interfere with daily life, an ophthalmologist may discuss vitrectomy, a surgery that removes the vitreous gel and replaces it with a clear solution. A YAG laser is sometimes used to break up specific floaters, but vitrectomy has a longer track record. Both have real risks and are reserved for cases where the visual impact is significant.
The takeaway
Floaters are usually a quiet part of getting older, not a sign that anything is wrong. Regular eye exams keep an eye on the rest of the picture. If a sudden burst of floaters appears, or you see flashes of light or a shadow over part of your vision, that is the moment to be seen the same day. We are happy to take a look at KSA.
