Central serous retinopathy (CSR)

Central Serous Retinopathy (CSR)

Central Serous Retinopathy (CSR) is a retinal condition that causes fluid to build up under the retina—the layer of tissue at the back of your eye responsible for capturing visual information. This fluid can cause the retina to detach slightly, resulting in blurred or distorted central vision.

The condition is usually temporary and resolves on its own, but in some cases, especially when it becomes chronic or recurs, CSR can lead to more lasting visual changes and may require treatment.

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Central Serous Retinopathy (CSR)

Central serous retinopathy is a disease affecting the retina, the light sensitive tissue in the eye. Fluid pools between the retina and its underlying support layers. With time, this fluid causes damage to the fine cells of the retina and can lead to blurred vision. In the majority of cases, this fluid resorbs spontaneously, and vision improves again. In some cases, the fluid can recur or affect the other eye.

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What Are the Symptoms of CSR?

The symptoms of CSR typically come on suddenly and may include:

Blurred or distorted central vision
A dark or grey spot in your central vision
Objects appearing smaller or further away than they actually are (micropsia)
Straight lines appearing wavy or bent (metamorphopsia)
Reduced colour brightness or contrast
Trouble reading or seeing fine details

CSR usually affects only one eye, although both eyes can be involved in some cases. Importantly, the peripheral (side) vision is usually preserved.

If you notice these symptoms, it’s important to seek a retinal specialist’s assessment to confirm the diagnosis and rule out other sight-threatening conditions.

How Common Is Central Serous Retinopathy?

CSR is one of the more common retinal conditions, especially among men aged 30 to 50. It’s estimated that about 1 in 10,000 people per year develop CSR, with a higher incidence in individuals who are:

Under high levels of psychological stress
Using corticosteroid medications (oral, topical, or injected)
Diagnosed with hypertension or cardiovascular risk factors
Sleep-deprived or working night shifts
Naturally predisposed due to genetics or personality type (e.g., “Type A” individuals)

It can also occur during or after pregnancy due to hormonal changes, although this is less common.

What Are the Treatment Options?

In acute cases, CSR usually resolves on its own within 1 to 3 months without treatment. However, for chronic or recurrent CSR, intervention may be required to prevent long-term visual damage.

Monitoring

In cases with mild symptoms and recent onset, your eye specialist may recommend monitoring the condition, as it often resolves without intervention.

Medical Treatments

Stopping steroid use (if applicable)

Laser Treatments

Photodynamic Therapy (PDT): A light-sensitive drug is injected and then activated by a laser to close the leaking blood vessels
Focal laser photocoagulation: A laser is directly applied to the leak (used less frequently now)

Every treatment decision depends on the severity, type (acute or chronic), and whether the patient’s daily life is affected.

What Causes CSR?

While the exact cause of CSR isn’t fully understood, it’s thought to be linked to:

Leaking of fluid through the retinal pigment epithelium (RPE), a thin layer beneath the retina that usually keeps fluid out
Increased cortisol (stress hormone) levels, which may affect the blood vessels in the choroid (the layer behind the retina)

Certain medications, especially steroids, are known to increase the risk of developing CSR. This includes not only oral steroids but also steroid eye drops, nasal sprays, skin creams, and even injections for other health conditions.

Types of Central Serous Retinopathy

CSR is classified into several types:

Acute CSR

This is the most common form and tends to resolve within a few weeks or months. Most people regain normal or near-normal vision.

Chronic CSR

This form persists longer than 6 months. It may involve persistent fluid, retinal thinning, and visual disturbances that don’t fully recover even after the fluid subsides.

Recurrent CSR

Some people experience multiple episodes of CSR over months or years. Management often involves identifying triggers and considering preventive treatments.

FREQUENTLY ASKED QUESTIONS

+ How long does CSR last?

Most acute cases resolve within 1 to 3 months. Chronic cases may require treatment and monitoring over time.

+ Can CSR lead to permanent damage?

Yes, particularly in chronic or untreated cases. Long-term fluid accumulation can damage the photoreceptors and lead to permanent central vision loss.

+ Is CSR painful?

No, CSR is typically painless.

+ Can CSR come back?

Yes, CSR can recur in some individuals. Managing stress and avoiding steroid medications when possible can reduce the risk.

+ What’s the difference between CSR and retinal detachment?

CSR involves fluid accumulation under the retina without a tear or hole, while retinal detachment usually involves a physical tear and is more urgent.

Don’t Ignore Changes in Your Vision

Central Serous Retinopathy can often be managed successfully—especially with early diagnosis and appropriate care. If you’re noticing blurriness, distortion, or difficulty focusing, don’t wait.

Book a consultation with retinal specialist Dr Zaid Shalchi to get the expert assessment and guidance you need.

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