YAG laser or vitrectomy for floaters: how do I choose?

How do YAG laser and vitrectomy differ?

YAG laser vitreolysis is done in the clinic. After dilating drops and a numbing drop, a contact lens is placed on the eye and short pulses of laser energy are focused on the floater to break it up. The gel itself stays in the eye. Vitrectomy is an operation in a day surgery theatre: fine instruments pass through the white of the eye and the vitreous gel is removed together with the floaters in it. The floaters overview describes both in outline; the table below sets them side by side.

Should I wait before choosing either?

Usually, yes. Most floaters appear when the gel separates from the back of the eye, a posterior vitreous detachment. Over the following months they tend to become less noticeable as they drift away from the centre of vision and the brain learns to ignore them. Dr Chen generally suggests allowing three to six months after floaters begin before considering treatment of any kind, and new floaters always need a dilated examination of the retina first.

Treatment becomes a reasonable discussion when floaters are still interfering with reading, screen work, driving or wellbeing after that time. The letter chart is often normal, because floaters mainly reduce contrast rather than sharpness. That is why the decision is based on how your floaters affect daily life, not on a test score.

Which floaters suit laser, and which are better removed?

Laser works on what it can see and safely reach. The best target is a single, well-defined floater floating in the middle of the gel, well away from the lens at the front and the retina at the back. A Weiss ring, the ring of tissue that often comes away from the optic nerve when the gel separates, is the classic example and the floater type studied in the main trial. That trial only treated rings at least 3 mm from the retina and 5 mm from a natural lens.

Weiss ringDiffuse strands

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Many troublesome floaters do not fit that description. A diffuse web of fine strands, many floaters spread through the gel, or a haze that makes the whole view murky cannot be cleared with a laser, and trying may take many sessions for little gain. Floaters very close to the retina are a particular problem: in some younger people they sit in a pocket of fluid just in front of the macula, the centre of the retina, where they are hard to see and too close to treat safely. In his 2018 review for optometrists, written with Dr Chris Hodge, Dr Chen described these floaters as unsuitable for laser. Vitrectomy removes floaters wherever they sit, which is why it suits these situations. The article on what floaters are made of explains why floaters differ so much.

Published selection criteria treat a floater that looks as though it would need more than about five sessions as unsuitable for laser. For such floaters, surgery or continued waiting is usually the better discussion. A dilated examination, and often a scan, shows which kind you have.

Does it matter whether I have had cataract surgery?

Yes, for both treatments. If you still have your natural lens, a laser pulse that strays too close can damage the lens and cause a cataract, sometimes quickly. This is why laser is only aimed at floaters well behind the lens. Vitrectomy, for its part, speeds up cataract formation in many eyes that still have their natural lens, especially after about age 50.

Before vitrectomyLater: fluid-filled eye with cataract

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If you have already had cataract surgery, the cataract concern largely falls away for both options. The artificial lens can still be marked by a laser pulse, but floaters close to a lens implant can be treated more safely than floaters close to a natural lens. Small fragments of capsule that float free after a laser capsulotomy for cloudy vision following cataract surgery are often good laser targets, because they are few and easy to see. Retinal detachment, and rarely infection, remain the main risks with vitrectomy. The article on cataract surgery after vitrectomy explains what the later cataract operation involves.

Does my age make a difference?

It can. Dr Chen's experience, described in his YAG laser article, is that younger patients often benefit less from laser than older patients, and one large study found older age was linked with a better laser result. Some younger people also have floaters close to the retina, which cannot be treated safely with laser.

Age also changes the trade-off with vitrectomy. For someone in their sixties or seventies, cataract surgery is often coming within a few years anyway, so an earlier cataract is a smaller cost. For someone in their thirties or forties with a clear natural lens that still focuses up close, an earlier cataract operation ends that natural focusing, so vitrectomy is a bigger step. In one large series of limited vitrectomy, about 4 in 10 eyes of people over 50 needed cataract surgery, on average about two years later, compared with fewer than 1 in 10 under 50. This technique deliberately leaves some gel behind the lens, and rates rise with longer follow-up.

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Many people troubled by floaters are short-sighted, and for them a later cataract operation can also reduce the need for glasses.

How much improvement can I expect from each?

With laser, a meaningful improvement is realistic for well-chosen floaters, but complete clearance is not the usual result. In the first trial comparing laser with a sham treatment, 19 of 36 people with a Weiss ring (53%) reported significant or complete improvement six months after one session, compared with none of 16 in the sham group. A second small trial, with 21 people analysed, found more people improved after laser than after a sham, although contrast sensitivity was no better than after the sham. A review of 15 studies (718 eyes) published in 2026 found improved vision-related quality of life after laser, but most of those studies were observational rather than randomised.

With vitrectomy, around nine in ten people in published series say they are satisfied or that their symptoms have been relieved, and contrast sensitivity usually improves. These series also had no untreated comparison group, and people who choose surgery tend to have the most troublesome floaters, so the figures cannot be set directly against the laser results.

The only study that treated patients with both methods in the same unit is old and small: laser helped moderately in 38% of treated eyes, while vitrectomy, mostly done after laser had not worked, fully resolved symptoms in 14 of 15 eyes (93%). Laser technique has changed since then. Taken together, the evidence suggests vitrectomy is the more complete treatment and laser the less invasive, less predictable one.

How do the risks compare?

Laser has no incision, but it is not risk-free. Reported complications include damage to the natural lens needing cataract surgery, raised eye pressure that has occasionally needed glaucoma surgery, bleeding or injury to the retina, retinal tears and detachment, and more floaters. In the small trials, serious problems were rare in the first six months. However, three people in the main trial developed a retinal tear one to three years later, and it is not known whether the laser caused them. Most of the more serious events are known from case reports and a voluntary register, so nobody knows how often they happen. That uncertainty is one reason UK guidance from the National Institute for Health and Care Excellence recommends laser only within research.

Vitreous detachmentRetinal tear and detachment

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Vitrectomy's risks are better measured because it has been studied in thousands of eyes. The important ones are an earlier cataract in eyes with their natural lens, retinal detachment in about 1 to 3 in 100 eyes in recent series, and rare infection inside the eye, about 2 in 1,000 in pooled data. Each needs further treatment when it happens. The vitrectomy surgery page explains the operation in more detail.

Neither option can promise a floater-free eye, and choosing neither is also reasonable. In one large specialist series, observation was chosen for just over half of the eyes with troublesome floaters. Those people tended to have less dense floaters, and their measurements stayed stable over the following year in those who returned for review.

What if laser has not helped?

A fresh assessment is more useful than another session by default. Dr Chen regularly sees people for a second opinion after laser has given little benefit, sometimes after several sessions. Continuing symptoms alone are not a reason to keep repeating laser: the question is whether there is still a clear, safely placed target and why another session should work when earlier ones did not.

Vitrectomy remains available after unsuccessful laser. In the older comparison series, most of the eyes that went on to vitrectomy had already had laser, and surgery resolved symptoms in almost all of the operated eyes. You do not need to try laser before discussing surgery either; for floaters that are unsuitable for laser, going straight to a discussion of vitrectomy, or of continuing to wait, is often the sensible path.

What is recovery like after each?

After laser, vision is blurred for a few hours from the dilating drops and the contact lens, and most people return to normal activities the same or the next day. Small gas bubbles made by the laser can be visible for a short time. Because eye pressure can rise after treatment, a check of the pressure is part of follow-up.

Vitrectomy for floaters performed by Dr Simon Chen

Vitrectomy for floaters performed by Dr Simon Chen

This short video shows real eye surgery.

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After vitrectomy for floaters, vision is blurred for the first few days, eye drops are used for a course your surgeon sets, and most people return to light activities within about a week. For routine floater surgery an air or gas bubble is not usually needed, so there is no special head positioning. The guide to recovery after vitrectomy for floaters covers driving, work, exercise and travel week by week.

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Other questions about choosing a floater treatment

Where can I read more?

mivision · October 2018

Degenerative Floaters: A Practical Review

Dr Simon Chen and Dr Chris Hodge. A review for optometrists covering assessment, observation, laser and vitrectomy.

Read the article →

When do floaters need urgent attention?

Contact your ophthalmologist urgently, or attend an emergency department, if you notice a sudden shower of new floaters, new flashes of light, a shadow or curtain across part of your vision, or a sudden drop in vision. These can be signs of a retinal tear or detachment, which can be painless. The guide to flashes, floaters or a curtain explains why these symptoms need prompt assessment.

After laser or vitrectomy, also seek urgent help for sudden loss of vision, severe or increasing pain, or a new curtain or shadow. Do not wait for your next appointment.