Drusen: Symptoms, Causes, Diagnosis and Treatment

Written by Medicover Team and Medically Reviewed by Dr Vompolu Kamakshi Bhaskar , Ophthalmologists

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1. Causes 2. Find a Doctor 3. Diagnosis 4. Treatment 5. FAQs

Drusen are small yellow deposits of proteins and lipids that accumulate beneath the retina, particularly under the macula. Small drusen are common with aging and may not affect vision, while larger or numerous drusen can increase the risk of age-related macular degeneration (AMD). Most people with drusen do not experience symptoms in the early stages. Early diagnosis through regular eye examinations and appropriate monitoring are important to protect vision and detect retinal changes promptly.

What are the Types of Drusen?

Drusen are generally categorised based on their size, appearance, and underlying cause. Understanding these types helps assess the risk of vision problems, especially related to age-related macular degeneration (AMD).

Hard Drusen

Small, distinct, and well-defined edges
Often seen in ageing eyes without significant vision loss
Usually not linked to severe retinal conditions

Soft Drusen

Larger, with blurred edges
Tend to cluster together
Associated with a higher risk of developing AMD

Retinal Drusen (Familial Dominant Drusen)

Inherited and appear earlier in life
Can resemble soft drusen but progress differently
May cause visual changes in younger individuals

Optic Disc Drusen

Found in the optic nerve head, not the retina
Can be visible or buried
May affect peripheral vision over time

What are the Drusen Symptoms and Warning Signs?

Drusen often develop silently, especially in the early stages, making regular eye checkups essential. However, as they progress, especially in cases linked to age-related macular degeneration (AMD), certain signs can aid in early detection and timely care.

Common Symptoms

Blurred or slightly distorted vision in the centre.
Difficulty seeing in low light or dim environments
Colours appear less bright or vivid
A need for more light when reading

Severe Symptoms

Straight lines appearing wavy or bent (metamorphopsia)
A dark or empty spot in the centre of vision
Rapid worsening of visual clarity
Loss of central vision in one or both eyes

What are the Common Causes and Risk Factors of Drusen?

Drusen form beneath the retina due to the buildup of waste from the eye's natural metabolic processes. While small deposits are familiar with ageing, specific causes and risk factors can increase the risk of progression to eye diseases like age-related macular degeneration (AMD).

Causes

Ageing retinal tissue leads to the accumulation of cellular debris
Genetic predisposition, especially with a family history of AMD
Chronic inflammation in the retina

Risk Factors

Age (more common in people over 60)
Smoking, which impairs retinal health
High cholesterol and hypertension
Obesity, which may accelerate drusen growth
A poor diet lacking antioxidants and omega-3 fatty acids
Prolonged sun exposure without eye protection

When to See a Doctor for Drusen?

Anyone who notices changes in central vision or has a family history of age-related macular degeneration should consult an Ophthalmologist or Retina Specialist. Regular eye examinations are especially important for adults over 50 years of age.

You should see a doctor if you experience:

Blurred or distorted central vision
Difficulty reading or recognizing faces
Gradual decline in visual clarity

Seek immediate medical attention if you:

Develop sudden central vision loss
Notice straight lines appearing wavy or distorted
Experience a new dark or blank spot in your central vision

These symptoms may indicate advanced age-related macular degeneration or other retinal conditions requiring urgent treatment.

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How is Drusen Diagnosed?

Diagnosing drusen involves a thorough eye examination to assess retinal health and detect early signs of age-related macular degeneration (AMD). Early detection enables timely management, helping to preserve vision.

Common Diagnostic Tests:

Dilated Eye Exam: Allows detailed examination of the retina and optic nerve
Optical Coherence Tomography (OCT): Provides cross-sectional imaging to view drusen size and location
Fundus Photography: Captures high-resolution images of the retina
Fluorescein Angiography: Detects abnormal blood vessel growth or leakage
Autofluorescence Imaging: Identifies retinal changes linked to drusen buildup

What are the Treatment Options for Drusen?

Drusen themselves often don't require treatment, especially in the early stages. However, their presence exceptionally soft drusen can signal a risk for age-related macular degeneration (AMD). Managing drusen focuses on slowing disease progression and preserving vision.

Treatment Options

Nutritional Therapy: Supplements rich in antioxidants, zinc, and vitamins C and E (based on AREDS2 guidelines) may help reduce the risk of AMD progression in patients with large drusen.
Lifestyle Modifications: Quitting smoking, eating a diet rich in leafy greens and omega-3 fatty acids, managing cholesterol levels, and wearing UV-protective eyewear can support retinal health.
Monitoring and Follow-ups: Regular OCT scans and retinal imaging are crucial for tracking any changes in drusen size or visual quality.
Advanced Therapies (if AMD develops): Anti-VEGF injections may be recommended if wet AMD develops due to complications from drusen.

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What is the Recovery Process After Drusen Treatment?

Recovery after drusen management focuses more on ongoing care than on a single procedure. Since there's no surgical removal for drusen, the goal is to monitor and prevent progression to age-related macular degeneration (AMD).

Follow-up Schedule

Regular eye exams every 6-12 months
OCT scans to monitor changes in drusen size and retinal health
Immediate checkups if vision changes occur

Lifestyle and Diet Recommendations

Eat a diet rich in leafy greens, colourful vegetables, and omega-3 fatty acids
Avoid smoking and manage blood pressure and cholesterol
Use sunglasses with UV protection to safeguard the retina

Frequently Asked Questions

1. Can drusen cause vision loss on their own?

Small drusen typically do not cause vision loss. However, large or soft drusen may lead to age-related macular degeneration, which can affect central vision.

2. How are drusen detected during an eye exam?

Drusen are identified using a dilated eye exam, often supported by retinal imaging tests like OCT or fundus photography.

3. What's the difference between hard and soft drusen?

Hard drusen are small with sharp edges and pose low risk. Soft drusen are larger, have blurry edges, and are more closely linked to vision loss and AMD.