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Optic Disc Drusen

Calcified deposits within the optic nerve head that can mimic papilledema but are usually benign.

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Optic disc drusen (ODD) are abnormal deposits of protein and calcium within the optic nerve head. They can make the optic disc appear elevated, mimicking papilledema, but they're usually a benign finding.

Optic disc drusen diagram comparing buried drusen with true papilledema and swollen optic disc
Optic disc drusen can elevate the nerve head and mimic true papilledema.

Key Takeaways

  • Benign deposits in the optic nerve head
  • Can mimic papilledema-important distinction
  • Usually asymptomatic but can affect peripheral vision
  • Often inherited (autosomal dominant)
  • Monitoring recommended for visual field changes

What Are They

  • Calcified hyaline deposits
  • Within substance of optic nerve head
  • Build up over years
  • May become visible (surface) or remain buried
  • Often bilateral

Symptoms

Often None

  • Many discovered incidentally
  • Routine eye exam finding

When Present

  • Visual field deficits-peripheral loss
  • Rarely central vision affected
  • Rarely: transient visual obscurations
  • Very rarely: sudden vision loss (from vascular event)

Why They Matter

Pseudo-papilledema

  • Elevated discs can look like papilledema
  • Important to distinguish-papilledema needs workup
  • Avoids unnecessary testing

Diagnosis

  • Clinical appearance (lumpy, elevated disc, no hyperemia)
  • OCT-shows drusen, no subretinal fluid
  • B-scan ultrasound-drusen are bright
  • Autofluorescence-drusen glow
  • CT orbit (rarely needed)-shows calcification
Optic disc drusen diagnostic infographic showing fundus appearance, OCT buried drusen, B-scan bright calcified echo, and autofluorescence drusen glow
Diagnostic comparison: fundus appearance, OCT evidence of buried drusen, B-scan bright calcified echo, and autofluorescence drusen glow.
Full image description
The illustration shows four diagnostic panels for optic disc drusen: a fundus view with a lumpy elevated disc, an OCT panel showing buried drusen in the optic nerve head, a B-scan ultrasound panel showing a bright calcified echo, and a fundus autofluorescence panel showing drusen glow.

Key Differences from Papilledema

Feature Drusen Papilledema
Disc margins Irregular, lumpy Blurred, hyperemic
Vessels Normal Dilated, obscured
Hemorrhages Rare Common
Symptoms Usually none Headache, TVOs

Management

  • Confirmation of diagnosis
  • Baseline visual field testing
  • Periodic monitoring (every 1-2 years)
  • No treatment to remove drusen
  • Manage any visual field loss conservatively

Prognosis

Excellent for most. Progressive visual field loss occurs in minority. Central vision usually preserved.

Frequently Asked Questions

Are optic disc drusen the same as drusen in macular degeneration?

No. Optic disc drusen are deposits in the optic nerve head. Macular drusen are retinal deposits associated with age-related macular degeneration. They are different findings in different locations.

Can optic disc drusen cause headaches?

They usually do not cause headaches. Headache with a swollen-looking optic nerve is one reason doctors work carefully to separate drusen from true papilledema.

Do optic disc drusen need treatment?

There is no treatment that removes the drusen. The practical plan is confirming the diagnosis, getting a baseline visual field test, and monitoring for field loss or rare vascular complications.

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