Can Both My Eyes Be Injected on the Same Day?
Same-Day Injections in Both Eyes at a Glance
Yes. Most retina specialists who inject often will treat both eyes at one visit.1 It is a routine option, not an unusual favor.
The worry behind the question is almost always the same one. If something goes wrong, could it go wrong in both eyes at once? That fear is reasonable, and the studies below speak to it directly.
Your doctor still decides visit by visit. Some days both eyes need treatment. Some days only one does.
Needing injections in both eyes is common, and it becomes more common the longer you are treated. Among 1,335 patients receiving anti-VEGF therapy, about 54 of every 100 needed treatment in both eyes at some point, and about 7 of every 100 had both eyes injected on the same day.2
The two main reasons behave differently. In that same group, bilateral treatment was needed by about 48 of every 100 people with diabetic swelling and about 36 of every 100 with wet macular degeneration.2 Diabetes tends to affect both eyes, while macular degeneration often takes one eye first and the other later, which is why this question usually arrives partway through treatment.
Three things change, and none of them is the injection itself. The visit runs longer. You should not plan to drive yourself home. And your retina team repeats every sterile step from scratch for the second eye.
The medicine, the needle size and the technique are the same as a one-eye visit. What differs is the choreography around them, which is where the safety of this approach actually lives.
What a Both-Eyes Injection Visit Involves
An intravitreal injection places medicine into the jelly-like center of the eye (clinical: the vitreous), where it can reach the retina directly. The eye is cleaned to lower infection risk and numbed, a small holder may keep your lids out of the way, and the medicine goes through the white of the eye with a very thin needle in a procedure that lasts seconds.3
Most people describe pressure rather than a sharp pain. The part that feels worst is usually the cleaning solution, not the needle.
This is the heart of the safety question. A well-run bilateral visit is not one procedure on two eyes. It is two complete procedures that happen to share an appointment slot.
Done well, that should mean a fresh sterile setup for the second eye: new gloves, a new needle and syringe, a new lid holder, a fresh drape, and a fresh cleaning of the eye. The Academy's clinical statement recommends cleaning the eye surface with an iodine-based antiseptic (clinical: povidone-iodine), and notes routine antibiotic drops are not indicated for preventing infection.4
Some teams go a step further and draw each eye's dose from a different vial, lot or batch. The reasoning is simple: if one batch were ever contaminated, drawing both doses from it would put both eyes at risk at once.
Practice varies here. In a published survey of 84 retina specialists, about 80 of every 100 frequent injectors performed same-day bilateral injections and about 73 of every 100 of those switched to different instruments between eyes, but there was no agreement on whether the two eyes must come from different drug lots.1 That survey is now several years old, and it is a fair thing to ask your own doctor about.
Plan for a longer appointment than a one-eye visit, though not double. The scans, the dilation and the waiting are shared; only the preparation and injection repeat.
Most practices can tell you their typical timing over the phone. Ask when you book, because knowing whether to plan for ninety minutes or three hours changes who needs to come with you.
Who Is a Good Candidate for Treating Both Eyes at Once
Same-day treatment earns its place when the second visit costs you something real. Long drives, a family member taking time off work, dependence on paid transport or a facility van, and injections that are already on the same interval all point in this direction.
It also suits people who have been through several injections already and know what to expect. Familiarity makes the longer visit much easier to tolerate.
Splitting is often better for a first-ever injection. Doing one eye first lets you learn how your body reacts before committing both eyes on the same afternoon.
Splitting also makes sense when your two eyes are on different schedules, when they need different medicines with separate coverage approvals, or when you would rather always have one comfortable eye to see with on treatment day.
The decision is a trade between convenience and caution, and it is genuinely yours to weigh in on. There is no single right answer for everyone.
Your doctor will look at how active the disease is in each eye, how well you tolerated past injections, what help you have at home, and whether anything about the current visit raises a reason to wait on one side.
Who Should Wait or Split the Visits
Your doctor examines both eyes before deciding, and a handful of findings usually mean treating that eye another day. None of them takes treatment off the table for good, and they usually mean waiting days, not months.
- An active infection or inflammation of the lid, lash line or eye surface.
- A recent injury or open wound on that eye.
- Very high eye pressure that needs sorting out first.
- A recent injection in that eye, if the interval is not yet up.
Expect questions about your general health, especially your heart and circulation. Anti-VEGF drugs injected into the eye do reach the bloodstream, and blood levels differ sharply between agents, with bevacizumab reaching far higher levels than ranibizumab after a single injection.5
Two injections on one day means twice as much drug given, so more of it can reach the bloodstream that day. Whether this matters for you is a conversation, not a rule, and it comes up most often after a recent stroke or heart attack. Say so plainly if either applies to you.
The most common reason both eyes are not done is the simplest one. The scan shows one eye is dry and stable, so that eye is left alone.
Treating an eye that does not need it adds risk without adding benefit, so a doctor who injects only one eye on a given day is usually protecting the other one, not overlooking it.
Questions to Settle Before the Visit
Say out loud that you want both eyes done at one visit, and ask whether your doctor agrees for this particular appointment. Plans change based on the day's scan, so confirm rather than assume.
Ask what happens if the second eye turns out not to need treatment. Knowing that in advance saves a disappointing surprise in the chair.
Arrange your ride before the appointment, not after. Both eyes will be blurry from the antiseptic, the dilating drops and the injection itself, and that combination rules out driving for the rest of the day.
Bring sunglasses, plan a light day afterward, and let whoever is driving you know the visit may run long. This single piece of planning is what most often goes wrong.
Plans generally do cover treating both eyes at one visit, but your share of the cost may reflect two injections rather than one. Confirm it rather than assume it.
Call the practice's billing office beforehand and ask what a two-eye visit looks like on your plan. Ask about the drug and the procedure separately, since they are often billed as different lines.
The First Hours and Days Afterward
Expect grittiness or a scratchy feeling in both eyes for several hours. That comes from the antiseptic and the drying effect of the lid holder, not from damage.
Vision is usually blurry or hazy at first, and many people see dark specks or a small bubble drifting in their sight. This settles for most people within a day.
Having both eyes treated removes the fallback of a clear eye, which is the practical difference most people underestimate. Steps, curbs and unfamiliar hallways are where problems happen.
Take an arm, go slowly, and let someone else carry things. Plan to rest at home rather than run errands on the way back.
A bright red patch on the white of one or both eyes is common and harmless, and it fades over one to two weeks like any bruise. Mild soreness that eases with time is expected too.
Artificial tears help the gritty feeling. Avoid rubbing your eyes, and skip swimming pools and hot tubs for the first couple of days.
Risks of Treating Both Eyes on the Same Day
Infection inside the eye, called endophthalmitis, is the risk that makes this question worth asking. It is rare, and the studies are large enough to say so with some confidence.
In a cohort of 101,932 bilateral same-day injections given at 50,966 visits to 5,890 patients, 28 eyes developed endophthalmitis, about 3 of every 10,000 injections, and no patient developed infection in both eyes.6 The Academy's own summary of that series puts it at roughly 1 infection in every 3,700 injections.7
This is the specific fear, so it deserves the specific answer, including the uncomfortable part. A systematic review of 17 studies covering 138,478 injections given in 69,239 same-day bilateral sessions found 33 cases of endophthalmitis and none affecting both eyes, and concluded that clinicians can consider same-day treatment while noting larger studies are still needed.8
It is not impossible, though. One published case report describes an 82-year-old woman treated for wet macular degeneration who developed infection in both eyes two days after a same-day bilateral injection, reported as the first such case in the literature.9 One case against tens of thousands of sessions is the honest shape of this risk: very small, not zero, and the reason the warning signs below matter.
A direct comparison points the same way. In a ten-year review of 30,258 injections, endophthalmitis followed 1 of 15,338 injections given in same-day bilateral sessions and 3 of 14,920 given one eye at a time, and the authors concluded that simultaneous bilateral injection was safe in their aseptic operating-room setting.10
Numbers this small swing easily and should not be read as bilateral being safer. The fair reading is that treating both eyes at one visit did not raise the infection rate.
Beyond infection, your consent form will list the other recognized risks of an injection into the eye: a brief rise in eye pressure, a red patch from a broken surface vessel, inflammation inside the eye, and, rarely, a tear or detachment of the retina. Treating both eyes doubles the number of exposures on that day but does not change the risk carried by each injection.
Most people go through years of injections without any of these. The realistic expectation for a both-eyes visit is a longer, duller afternoon and two mildly sore eyes by evening.
When to Call Your Retina Team
These symptoms are uncommon, and they are worth knowing precisely because acting the same day is what protects sight. The Academy advises that patients be told to promptly report pain, worsening redness, reduced vision, light sensitivity or increased floaters, which can signal infection inside the eye.4
- Severe eye pain, or pain that builds over hours instead of easing.
- Vision that gets worse rather than better after the first day.
- Redness that deepens after day one, or thick discharge.
- A shower of new floaters, flashing lights, or a dark curtain across your sight.
Call your retina office immediately if any of these appear in either eye, including at night or on a weekend, and go to an emergency room if you cannot reach anyone. Infection inside the eye can be treated, and outcomes are generally better the sooner treatment starts.
Knowing what to ignore matters as much as knowing what to report. A red patch on the white of the eye, mild grittiness, a few new floaters and some haze on the first day are all expected after an injection.
The pattern that separates normal from worrying is direction. Normal symptoms improve day by day; the ones above get worse.
Call the retina practice that gave the injection rather than a general clinic or an optometrist, because they can see you the same day and have your scans. Ask for their after-hours number before you leave the office.
Keep that number in your phone and give it to whoever drives you. If you are worried at 9 p.m. and cannot find it, that is exactly when a treatable problem waits until morning.
Questions Patients Ask About Same-Day Injections in Both Eyes
The large series do not show a higher infection rate for same-day bilateral treatment, and across 69,239 reviewed bilateral sessions no case affected both eyes.8 A single case report of infection in both eyes does exist, so the risk is very small rather than zero.9 The safety rests on each eye being handled as a separate sterile procedure. Ask directly how your practice separates the two eyes.
Yes, and this is the part most people underestimate. Between the antiseptic, dilating drops and the injection itself, both eyes are typically hazy for several hours, and floaters or a drifting bubble are common on the first day. You will not have a clear eye to fall back on, so arrange a driver and plan to rest at home. Vision usually settles within a day.
Usually yes, because two eyes means two doses of medicine and two procedures, even in one appointment. Insurance generally covers same-day bilateral treatment, but your out-of-pocket share may reflect both. What it saves is travel, time off work for whoever drives you, and a second copay for the office visit itself. Ask the billing office for the specifics on your plan before the appointment.
Some practices insist on it and others do not, and both approaches are in wide use. The argument for separate vials or lots is that a single contaminated batch cannot then reach both eyes. In a survey of retina specialists, most switched instruments between eyes, but there was no consensus on drug lots.1 It is a reasonable question to raise with your own doctor, who can explain their protocol.
You can, but many retina specialists prefer to start with one. Doing a single eye first lets you find out how the drops, the pressure sensation and the after-effects feel for you before committing both eyes on the same day. If the first injection goes smoothly, moving to same-day bilateral treatment at the next visit is straightforward. Ask your doctor which they recommend for you.
Then only that eye should be injected. The scan and examination decide it, and a quiet, dry eye is left alone rather than treated on schedule. This can feel like a change of plan when you arrived expecting both, but injecting an eye that does not need it adds risk without benefit. Ask to see the scans that led to the decision.
More Questions About Safety, Timing and Follow-Up
On that day, yes. Anti-VEGF drugs given in the eye reach the bloodstream in measurable amounts, and levels differ a lot between agents.5 For most people this has not been a practical problem, but it is why your doctor asks about recent stroke or heart attack and about your general circulation. If you have a significant heart history, raise it before agreeing to both eyes on one day.
Most people are comfortable and seeing normally by the next day and go back to usual activities then. Driving on the day of the injection is not sensible with both eyes affected. Desk work the same afternoon is usually unrealistic too, since screens are hard to read through the haze. Plan the appointment for a day you can write off, and treat the next morning as your return point.
Almost always no. Infection after an injection is a local problem in the eye that was injected, and reviews covering tens of thousands of same-day bilateral sessions found no case affecting both eyes.8 A single case report of both eyes being affected exists, which is why your team will examine the other eye rather than assume it is fine.9 The unaffected eye is watched, not treated.
Many will, and asking is reasonable. Same-day bilateral injection is widely practiced: in one survey, about 80 of every 100 frequent injectors offered it.1 Some doctors still prefer to alternate eyes, and that is a defensible choice rather than an outdated one. If yours declines, ask what would change their mind, since the reason is often specific to your eyes rather than a blanket policy.
Bring these to your next visit and note the answers.
- Do both of my eyes need treatment at this visit, or only one?
- How does your team keep the two eyes separate during a same-day bilateral injection?
- Do you use a different vial or lot for each eye, and why or why not?
- Given my heart and stroke history, is there any reason to spread my injections across two visits?
- How long should I expect a two-eye visit to take, and when will I be able to see normally again?
- What is your after-hours number, and what symptoms should make me use it?
- Ophthalmology Case Reports / OA Text, survey of retina specialists (2017). Survey of bilateral intravitreal injection practices.
- BMC Ophthalmology (free full text via PubMed Central) (2016). Estimation of the need for bilateral intravitreal anti-VEGF injections in clinical practice.
- American Academy of Ophthalmology, EyeSmart patient education (2024). Anti-VEGF Treatments.
- American Academy of Ophthalmology (2025). Intravitreal Injections (clinical statement).
- British Journal of Ophthalmology (Avery RL, et al.; PubMed record) (2014). Systemic pharmacokinetics following intravitreal injections of ranibizumab, bevacizumab or aflibercept in patients with neovascular age-related macular degeneration.
- American Journal of Ophthalmology (Borkar DS, et al.; PubMed record) (2018). Endophthalmitis Rates after Bilateral Same-Day Intravitreal Anti-Vascular Endothelial Growth Factor Injections.
- EyeNet Magazine, American Academy of Ophthalmology (2018). Endophthalmitis Following Bilateral Same-Day Anti-VEGF Injection.
- International Ophthalmology (2024). Endophthalmitis following same-day bilateral anti-VEGF injections: a systematic review.
- Acta Ophthalmologica (Sepetis AE, Clarke B, Gupta B), 99:e131-e133 (2021). Bilateral endophthalmitis following bilateral same-day anti-VEGF injections.
- Pakistan Journal of Medical Sciences (free full text via PubMed Central) (2022). Safety of simultaneous bilateral intravitreal versus unilateral anti-vascular endothelial growth factor injection in an operating room setting.