Every monsoon we see an increase in dengue cases in India. Most patients and families which are very natural pay attention to the fever, the platelet count, and body pain. What very few are aware of is that dengue also affects the eyes at times very seriously. Fever and eye pain together during a dengue attack are not just a minor issue. They are in fact early signals that the virus is going after your vision and requires prompt attention at an eye specialist, not just rest and paracetamol. This is a point which we bring up with our dengue recovery patients’ because eye issues can present even as the general fever breaks.
What Is Dengue Fever and Why Can It Affect the Eyes?
Dengue is a viral disease which we see present in the tropical and sub tropical regions and which is the largest of the mosquito borne diseases in India today with hundreds of millions of cases reported worldwide annually.
The dengue virus causes a systemic inflammatory response which is far reaching beyond just muscle and joint pain. We see that blood vessels break down and become very inflammatory. The eye with its rich blood supply and delicate structure is very much at risk for these changes.
Ocular complications present during the acute stage of dengue while the patient is still febrile or in the post-infectious phase at a time when the general illness may be improving. This delay is what causes dengue eye symptoms to often go unrecognized or written off to general fatigue.
Fever and Eye Pain: Dengue Eye Symptom
Pain in the eyes is also reported by the CDC and other global health organizations as a primary symptom of dengue fever. Patients report it as a deep aching which in turn amplifies with eye movement.
This is to be distinguished from eye complications which some patients may experience, as it is a part of the acute body wide response. But when fever and eye pain and also other visual dengue eye symptoms develop it is important to tell which is which.
Retro orbital pain (behind the eye) is a very common feature of acute dengue which usually improves as the fever breaks. True ophthalmic complications which include inflammation of certain eye structures that may affect vision and require specific treatment. In the past we have seen reports of blurred vision, floaters, visual distortion, light sensitivity, or redness which present during or after a dengue episode and these were written off as just “fever related issues”. What we did was a mistake these are signs the eye may in fact be affected.
Dengue Eye Symptoms: What Can Happen to the Eyes?
Studies in India and other dengue affected regions have reported a series of ophthalmic complications related to dengue fever. Some are of little more than a transient nature; others may cause severe vision loss if not treated early.
| Ocular complication | What it involves | Typical symptoms |
| Subconjunctival haemorrhage | Bleeding under the clear membrane covering the white of the eye, due to low platelets and increased vascular permeability. | Dramatic red patch on the white of the eye; usually painless; resolves on its own |
| Conjunctivitis | Inflammation of the conjunctiva. | Redness, watering, gritty feeling, mild discharge |
| Uveitis | Inflammation of the uvea the middle vascular layer of the eye. | Eye pain, redness, light sensitivity, blurred vision, floaters |
| Dengue maculopathy | Involvement of the macula the central retina responsible for detailed vision. | Central vision blurring or distortion; a dark or grey spot in central vision |
| Retinal vasculitis | Inflammation of the blood vessels in the retina. | Blurred vision, visual field changes, floaters |
| Optic neuritis | Inflammation of the optic nerve. | Reduced vision, colour desaturation, pain with eye movement |
| Vitreous haemorrhage | Bleeding into the jelly inside the eye in severe cases. | Sudden floaters, dark shadows, significant vision loss |
Among these, dengue maculopathy is particularly important in the Indian context and has been reported with increasing frequency in medical literature from tertiary eye centres across India. It can cause significant central vision disturbance and, in some cases, persistent visual impairment if not identified and managed promptly.
Who Is at Risk for Dengue Eye Complications?
Not all dengue patients will get eye issues. Most dengue patients do not have ophthalmic involvement. But we do see some patients which present with eye complications.
In severe dengue, which includes very low platelet count, dengue haemorrhagic fever, or dengue shock syndrome, we see a higher risk for bleeding in the eye which includes subconjunctival haemorrhage and vitreous haemorrhage. Also secondary dengue infection which is getting a different dengue virus strain after a prior infection brings about a more serious immune response which in turn increases the risk of complications which include eye problems.
Age and pre existing eye conditions also play a role. We see that patients with retinal or vascular issues may be more at risk for dengue-related retinal involvement. Also it may be that ophthalmic manifestations of dengue are more common than we thought. From Indian studies we have reports of patients who first went to ophthalmologists with vision issues, which was only later identified as the cause; in these cases, the ophthalmologist was the first to suspect the infection.
The 7 Warning Signs of Dengue to Know
Dengue presents in stages, at which point the most critical is the 24 to 48 hour mark after the onset of fever when the body’s response is at peak and it is most at risk for complications.
For which to seek urgent medical care that indicate severe dengue are:.
- Severe abdominal pain or persistent tenderness
- Persistent nausea and vomiting which occurs for at least 24 hours.
- Rapid breathing or difficulty breathing
- Bleeding from the nose or gums
- Blood in vomit or stools
- Extreme fatigue, restlessness, or irritability
- Sudden onset of vision blurring, floaters, or redness in the eye.
That we included that point which which is to say we do not always include it in the broad picture but also that the report of new visual issues in particular issues like blurry vision or floaters at the time of or after a dengue episode is a warning sign which should prompt for an urgent ophthalmic evaluation along with the routine medical care.
How Are Dengue Eye Complications Diagnosed?
If you or a family member develops visual dengue eye symptoms during or after dengue fever, a prompt examination at an eye hospital is essential. The examination typically includes:
| Investigation | Purpose |
| Slit-lamp examination | Evaluates the front of the eye for uveitis, conjunctival changes, and haemorrhage |
| Dilated fundus examination | Assesses the retina, macula, and optic nerve for dengue-related changes |
| OCT (Optical Coherence Tomography) | Provides detailed cross-sectional imaging of the macula to detect maculopathy and sub-retinal or intra-retinal fluid |
| Fundus fluorescein angiography (FFA) | Maps blood vessel leakage and identifies areas of retinal vasculitis or ischaemia |
| Visual acuity and colour vision testing | Quantifies how much vision has been affected and monitors recovery |
The eye examination should ideally be done while dengue serology and platelet counts are being monitored, so the eye findings can be interpreted alongside the systemic picture.
Treatment of Dengue Eye Complications
Most in mild cases of dengue for example subconjunctival hemorrhage and conjunctivitis – they are self limiting and go away as the dengue subsides which is to say that specific eye treatment is not required. As for more serious complications we treat according to the affected structure.
| Complication | Treatment approach |
| Uveitis | Topical or systemic corticosteroids to control intraocular inflammation, with careful monitoring given the potential for platelet suppression in dengue |
| Dengue maculopathy | Observation and OCT monitoring in mild cases; systemic steroids in more significant cases with visual loss |
| Retinal vasculitis | Treated similarly to uveitis with anti-inflammatory therapy; close retinal monitoring |
| Optic neuritis | Systemic steroids under close supervision by both ophthalmologist and physician |
| Vitreous haemorrhage | Conservative management in mild cases; surgical intervention in severe or non-resolving cases |
At the core of the issue is that some of these complications may lead to permanent vision loss when not identified at early stages. Reports indicate dengue related vision loss may be irreversible for some affected patients and also it may cause bilateral visual impairment. At first sign of which dengue eye symptoms to present to the health care provider for best results in full visual recovery.
Eye Care Tips During and After Dengue Fever
In practical terms here is what we tell our patients and families when we find out or suspect dengue:.
- Do not ignore signs from your eyes. A fever and eye pain, or any change in vision at the time of dengue illness should be a reason to get an eye exam, not just rest.
- Report to your ophthalmologist that you had dengue. If you go to an eye specialist during or after a dengue episode, tell them. Many dengue related eye issues present with a tell tale sign which a doctor may recognize better in the context of your overall health.
- Also do follow up. Continue with regular eye checkups even after the fever breaks. Some eye issues for example maculopathy and uveitis may present or get worse in the days after the fever and eye pain has reduced, what is known as the critical or defervescence phase. A follow up eye check up one to two weeks after you are discharged from dengue care is a good idea for people who had a serious case of dengue eye symptoms.
- Protect yourself from mosquitoes. Prevention is the best approach. Get rid of standing water around the home, use mosquito repellant, wear long sleeves at peak mosquito hours, use nets and screens which all reduce the risk of dengue and thus its complications which include eye issues.
- Stay off the eye drops. Do not put in steroid eye drops if your eyes are red and uncomfortable during dengue. In some cases steroids may in fact make dengue related issues worse if used without a diagnosis.
Eye Care at Vasan Eye Care
At Vasan Eye Care we do a slit lamp exam, dilated fundoscopy and OCT imaging as indicated with our patients that present with dengue related eye issues. We have an experienced team which does an excellent job in identifying dengue maculopathy and uveitis and we coordinate care with our internal medicine and infectious disease specialists as required.
We also do post dengue eye review for patients which had a serious bout of dengue even if they did not report dengue eye symptoms at the time of acute phase some retinal changes may only be seen at an exam. We have a full range of eye treatments which include anti inflammatory therapy and retinal monitoring available all under one roof at our specialist eye hospital.
Key Takeaways
Dengue fever and eye pain affect many ways from simple subconjunctival bleeding to uveitis, maculopathy, retinal vasculitis and optic neuritis. Fever and eye pain are reported in acute dengue, but new blurring, floaters or visual distortion during or after dengue fever and eye pain are signs of true ophthalmic involvement which in turn require prompt evaluation by an eye specialist. Most mild eye issues resolve with the dengue illness, but serious issues like maculopathy and uveitis require specific treatment and monitoring to avert permanent vision loss. Dengue eye symptoms may appear or worsen after the fever and eye pain breaks which in turn makes post dengue follow up at an eye hospital an important and often ignored part of recovery.
Frequently Asked Questions
Severe abdominal pain, persistent vomiting more than 3 times in 24 hours, very fast breathing, nose or gum bleeding, blood in vomit or stools, extreme fatigue or restlessness, also sudden changes in vision that include blurring, floaters, or new eye redness. Of these signs especially changes in vision emergency medical care is required which also include an eye exam along with a full medical evaluation.
Yes, dengue does affect the eyes. Ocular complications of dengue range from mild self limiting issues like subconjunctival haemorrhage and conjunctivitis to more serious problems like uveitis, dengue maculopathy, retinal vasculitis, and optic neuritis. In India we have reports of patients which present first to the ophthalmologist with visual dengue eye symptoms is even confirmed systemically. Though not all dengue patients develop eye complications, in those that do prompt evaluation is key to prevent permanent vision loss.
Patients in the severe dengue group which includes those which have very low platelet count, dengue haemorrhagic fever and eye pain, or dengue shock syndrome are at greater risk for bleeding related eye complications. In secondary dengue infection which is when a person is infected with a different dengue serotype than the first we see a more robust immune response and which in turn may cause increased incidence of ocular and systemic complications. Also age as well as a background of eye or blood vessel conditions before the disease takes hold, along with delay in medical attention are known to play a role in the degree to which the eyes are affected in a dengue case.
References
- CDC – Symptoms of Dengue and Testing
https://www.cdc.gov/dengue/signs-symptoms/index.html - PMC – An Update on the Ocular Manifestations of Dengue
https://pmc.ncbi.nlm.nih.gov/articles/PMC11717331/ - PMC – Ophthalmic Complications of Dengue Fever: A Systematic Review
https://pmc.ncbi.nlm.nih.gov/articles/PMC4108139/