Why Your Team Wants an Eye Exam When You Have an Infection in Your Blood
When an Eye Check During a Bloodstream Infection Cannot Wait
If you are being treated for an infection in your blood and you notice any of these changes in either eye, tell your medical team the same day so an eye doctor can look:
- New blurred vision or a drop in how well you see.
- New floaters, which look like specks, cobwebs, or drifting shadows.
- Eye pain or a deep ache in or behind the eye.
- New redness of the eye.
- New sensitivity to light.
A bloodstream infection can spread to the inside of the eye and cause a serious infection there called endogenous endophthalmitis, which shows up as blurred or lost vision, floaters, eye pain, redness, and light sensitivity, and it needs prompt care because delay costs sight.1 The reassuring part: most people being treated for a bloodstream infection never develop this, and the outlook is best when it is caught early and treated quickly.
In a healthy day, blurry vision or a new floater is rarely urgent. It is different while germs are circulating in your blood, because those germs can settle in the eye. The same review found that this kind of eye infection makes up 2 to 8 of every 100 cases of severe internal eye infection and can be caused by yeast such as Candida or by bacteria.1 New eye symptoms during that window are the signal that the eye may be one of the places the infection has reached.
You do not need to go to a separate emergency room on your own if you are already admitted or under a doctor's care for the bloodstream infection. Tell the team caring for you the same day, and ask that an ophthalmologist (eye doctor: MD) be called to examine you. If you are at home and finished with treatment, call your eye doctor or your treating doctor the same day rather than waiting for a routine appointment.
Eye Exams During a Bloodstream Infection at a Glance
When you have certain germs in your blood, especially the yeast Candida, doctors want to look at the back of your eye because the infection can quietly seed the retina and the jelly inside the eye. Guidelines advise a dilated eye examination for patients with a Candida bloodstream infection, done within the first week for most patients and after blood counts recover for patients with very low white cells.2 The exam is quick, and finding or ruling out eye involvement changes how long you are treated.
In a routinely screened group, endogenous Candida endophthalmitis was found in fewer than 1 of every 100 patients, and the American Academy of Ophthalmology does not recommend a routine eye consult for people with a Candida bloodstream infection who have no eye symptoms.3 So this is uncommon. The exam exists to catch the few cases early, not because your eye is likely infected.
If your eyes look normal, that is good news and it may shorten your treatment course. If the doctor sees signs of infection, your antifungal or antibiotic plan is adjusted, and you may need extra treatment aimed at the eye. Either way, you are not deciding this alone: the eye doctor and the team treating your blood infection plan it together.
What an Eye Infection From the Bloodstream Actually Is
Chorioretinitis means inflammation and infection in the retina and the layer of blood vessels behind it. Endophthalmitis means infection has spread into the vitreous, the clear jelly that fills the eye, which is more serious. When these come from germs traveling through the blood rather than from an eye injury or surgery, doctors call it endogenous endophthalmitis, and it presents with blurred vision, floaters, eye pain, redness, and light sensitivity.1
The eye has a rich blood supply at the back. When bacteria or yeast circulate in the bloodstream, they can lodge in those small vessels and start an infection in the eye tissue. This is the same process that lets a bloodstream infection seed other organs, and it is why doctors treat the eye as one more place to check when the blood is infected.
Most eye infections come from the outside: an injury, a scratch, contact lens misuse, or after eye surgery or an injection. Those are called exogenous. The kind this page is about comes from the inside, carried by your blood. The symptoms can look similar, but the cause, the workup, and the treatment plan are different because the source is a body-wide infection.
Which Bloodstream Infections Can Reach the Eye
Candida is the germ most often behind the eye exams doctors order during a bloodstream infection. Candida is the leading fungal cause of infection that spreads to the eye through the bloodstream.1 That is why guidelines single out a Candida bloodstream infection as a reason to examine the retina. Risk is higher for people in intensive care, those with a central intravenous line, and those on long courses of antibiotics.
Bacterial spread to the eye is often driven by Klebsiella pneumoniae together with a liver abscess in East Asia, and by heart-valve infection (endocarditis) and other sources elsewhere.1 These bacterial forms tend to move faster and hit vision harder than the yeast form, so any new eye symptom during a serious bacterial bloodstream infection deserves a same-day look.
The people most likely to be affected are those with a weakened immune system, diabetes, a serious ongoing infection, a central line or catheter, recent abdominal surgery, or injection drug use. If any of these apply to you, your team is more likely to arrange an eye exam, and you should be a bit more alert to new eye symptoms.
Signs the Infection May Have Reached Your Eye
The typical symptoms of an eye infection that spread through the blood are blurred or reduced vision, new floaters, eye pain, redness, and light sensitivity.1 These often affect one eye but can affect both. Vision changes and floaters are the most common early clues, so do not wait for pain before speaking up.
This is the key reason your team does not simply wait for you to complain. In one series of candidemia patients examined, about 6 of every 100 (9 of 148) had signs of Candida in the retina, and nearly half of those had no eye symptoms at all.2 Early retinal infection can be silent, which is exactly why a doctor looking at the retina catches things you cannot feel.
Because the germs arrive through the blood, both eyes are exposed, and infection can appear in one eye or in both. Noticing a change in only one eye does not make it less important. Cover each eye in turn now and then during treatment so you would notice if one eye has quietly changed.
How the Eye Exam Is Done and What It Looks For
An eye doctor puts drops in your eyes to widen the pupils, waits a short time, then uses a bright light and lenses to look at the retina and the vitreous. Guidelines recommend this dilated examination be done by an ophthalmologist for patients with a Candida bloodstream infection.2 It does not hurt, though the drops blur your near vision and increase light sensitivity for a few hours.
For most patients the exam is advised within the first week after the blood infection is found, and for patients with very low white blood cell counts it is timed for after those counts recover, because a suppressed immune system can hide the infection.2 Early timing lets any eye involvement be caught before it damages the central vision.
Whether the eye is involved changes treatment length: without eye involvement, antifungal treatment often runs about 2 weeks, while with eye involvement at least 4 to 6 weeks is advised.2 A normal exam can shorten your course; an abnormal one means longer, and sometimes stronger, treatment.
How an Eye Infection From the Bloodstream Is Treated
Treatment starts with medicines given into a vein or by mouth that can reach the eye, chosen to match the germ found in your blood. Endogenous endophthalmitis is treated with systemic antibiotics or antifungals, sometimes with medicine injected directly into the eye, and sometimes with surgery.1 Your infection team and eye doctor pick the combination together.
When infection is inside the eye, the medicine may not reach it well enough by vein alone, so the eye doctor can inject antibiotic or antifungal directly into the eye. In more advanced cases, a retina surgeon may do a vitrectomy, an operation that removes the infected jelly and helps clear the infection. These steps are decided case by case based on how much of the eye is involved.
Treatment length depends on the germ, how much of the eye is affected, and how you respond. Eye involvement generally means a longer course than a bloodstream infection alone. You will usually have repeat eye exams to confirm the infection is clearing before treatment stops.
Risks, Outlook, and What Recovery Looks Like
Endogenous endophthalmitis can seriously threaten sight, and outcomes vary by the germ: across cases, roughly 3 to 6 of every 10 people reach 20/200 vision or better, with yeast infections tending to do better than bacterial or mold infections.1 These are averages across many people and cannot predict your own result, which depends on the germ, how early it is caught, and your overall health.
Outcomes tend to be harder when the cause is an aggressive bacterium such as Klebsiella, when treatment starts late, or when the central retina is already involved. This is the reason behind the whole approach on this page: catching eye involvement early, before it reaches the center of vision, gives the best chance.
Finding infection while it is small, or ruling it out entirely, is where the eye exam earns its place. An early normal exam brings peace of mind and may shorten treatment; an early abnormal exam lets treatment start before vision is lost. Neither benefit is possible if the eye is never checked.
When to Call, and Who Looks After This Care
During or shortly after treatment for a bloodstream infection, call your team the same day for new blurred or reduced vision, a shower of new floaters, eye pain, new redness, or new light sensitivity in either eye. These are the same symptoms that signal an eye infection spread through the blood, and prompt care protects vision.1 It is always reasonable to ask for an eye exam if you are worried.
Even without symptoms, keep any scheduled eye exams your team arranges. Repeat exams confirm the eye stays clear or track a known infection as it heals. If your blood counts were low at first, ask whether your eye exam should be repeated once your counts recover.
This care is shared between the doctors treating your bloodstream infection, often an infectious disease team, and an ophthalmologist, usually a retina specialist when the back of the eye is involved. It is beyond what a routine eye check with a general optometrist handles, so ask to be connected to the right specialists rather than managing it on your own.
Common Questions About Eye Exams During a Bloodstream Infection
Because early infection at the back of the eye can be silent. In one candidemia series, nearly half of the patients found to have Candida in the retina had no eye symptoms.2 A doctor looking directly at the retina can catch infection you cannot feel yet, which is the whole point of checking before symptoms appear. Feeling fine is reassuring, but it does not rule out early involvement, so the exam is worth keeping.
No. The doctor puts dilating drops in your eyes, waits for the pupils to widen, then shines a light and uses lenses to look inside. It is not painful. The main effect is that your near vision blurs and bright light feels harsh for a few hours afterward, so you may want someone to drive you and to avoid glare until it wears off. The exam itself takes only a few minutes.
For most people it is uncommon. Among routinely screened patients with a Candida bloodstream infection, endophthalmitis was found in fewer than 1 of every 100.3 The exam is done to catch the small number of cases early, not because eye infection is expected. Your personal risk is higher if you have a weakened immune system, diabetes, a central line, or an aggressive bacterial infection, which is why timing and judgment are individualized.
Candida yeast in the blood is the classic reason, and guidelines specifically advise an eye exam for it. Bacterial causes such as Klebsiella with a liver abscess or heart-valve infection can also spread to the eye.1 If your bloodstream infection is one of these, or if you have new eye symptoms with any bloodstream infection, an eye exam is reasonable. Ask your team whether your specific germ is one that warrants a look.
If the eye doctor sees signs of infection, your treatment is adjusted. Eye involvement lengthens antifungal treatment from about 2 weeks to at least 4 to 6 weeks, and sometimes adds medicine injected into the eye or surgery.2 You would also have follow-up eye exams to confirm the infection is clearing. Finding it is not a disaster; it is exactly the early catch the exam is designed for, and treatment can protect vision.
It can, which is why it is taken seriously, but permanent loss is not the usual outcome when infection is caught and treated early. Outcomes vary by the type of germ, and starting treatment promptly gives the best chance of protecting vision.1 The strongest thing in your favor is early detection, so report new eye symptoms promptly and keep any eye exams your team arranges rather than waiting to see if they pass.
More Questions About Protecting Your Eyes During a Bloodstream Infection
Yes, that timing is deliberate. For patients with very low white blood cell counts, the eye exam is timed for after those counts recover, because a suppressed immune system can mask the signs of infection in the retina.2 A too-early exam might look falsely normal. In the meantime, report any new eye symptoms right away, and make sure the delayed exam is actually scheduled once your counts come back so it is not forgotten.
It depends on what is found. If the first exam is normal and you stay well, one may be enough. If infection is seen, or if your first exam was delayed for low blood counts, you will likely need repeat exams to confirm the eye stays clear or to track healing. Ask your eye doctor how many exams they expect and when, so you can keep the follow-up on track.
Yes. If you are seriously ill, a family member can tell the care team if you mention things looking blurry, seeing new floaters or shadows, complaining of eye pain, or if an eye becomes red. Because early eye infection from the blood can be silent, and some patients cannot report symptoms, a doctor's exam remains the reliable check.2 So the exam matters most exactly when you cannot describe how your eyes feel.
No. Pink eye and infections after an injury or eye surgery come from the outside surface of the eye. The infection this page covers comes from inside, carried by the bloodstream, and reaches the deeper eye tissue.1 It can look similar from the outside, with redness or discomfort, but the cause and treatment differ because the source is a body-wide infection. That is why it is handled by the infection team together with an eye specialist.
- Does my bloodstream infection call for a dilated eye exam, and when should it happen?
- Should my exam wait until my blood counts recover, and who will make sure it gets scheduled?
- What eye symptoms should make me call you the same day?
- If my eye exam is normal, can my treatment be shorter?
- If the eye is involved, what does treatment add, and how many follow-up exams will I need?
- Which specialists, such as a retina doctor, will be involved in my care?
- American Academy of Ophthalmology, EyeNet Magazine (2016). Endogenous Endophthalmitis: Diagnosis and Treatment.
- Lehman et al., Open Forum Infectious Diseases (2024). Do Patients With Candidemia Need an Ophthalmologic Examination?.
- American Academy of Ophthalmology, Ophthalmology (Clinical Statement) (2022). Recommendations on Screening for Endogenous Candida Endophthalmitis.