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Starry Eyed

Short answer: Asteroid hyalosis fills the eye's vitreous gel with hundreds of tiny yellow-white spheres ('asteroid bodies') made of calcium, phosphate and lipids. To an eye doctor they glitter like stars in a night sky, but most people who have them never notice.

It affects roughly 1 in 100–130 people, becomes far more common with age, is more common in men, and usually affects only one eye. It needs no treatment unless it hides the retina during an exam or, rarely, blurs vision.

VideoWrite-up5 sources

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What should you know about Starry Eyed?

Quick facts. Each one stands alone and has a stable ID you can cite.

  1. Asteroid hyalosis is a condition in which harmless calcium-lipid bodies float inside the eye.

    DD-001-F01 · Write-up · Exhibit A (Stars in the vitreous)

  2. Asteroid hyalosis fills the eye's vitreous gel with tiny calcium-phosphate-lipid spheres that glitter like stars but rarely affect vision.

    DD-001-F02 · Write-up · Exhibit A (Stars in the vitreous)

  3. About 1 in 100 people have asteroid hyalosis. It becomes much more common with age, is more common in men, and usually affects only one eye.

    DD-001-F03 · Write-up · Exhibit E (Age, men and one eye)

Video transcript: Starry Eyed: Some People Have Tiny Stars Floating in Their Eyes

DID YOU KNOW? Asteroid hyalosis is an eye condition in which tiny calcium/lipid deposits called asteroid bodies, accumulate within the vitreous humor, the gel-like substance that fills the inside of the eyeball. These deposits appear as small, white or yellowish sparkling particles that float in the vitreous humor, but are usually harmless and rarely affect vision significantly. NOW YOU KNOW!

Burned-in captions, read frame by frame (see transcript.md) · 20.5s Reel ·

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The write-up

Some people have tiny stars floating in their eyes. Asteroid hyalosis: harmless calcium-lipid specks that glitter in the gel of the eye.

  1. Exhibit A

    Stars in the vitreous

    Asteroid hyalosis is a condition of the vitreous, the clear gel that fills the eyeball. It's marked by many small yellow-white spheres called asteroid bodies, scattered at random or strung in chains and sheets.

  2. Exhibit B

    What they're made of

    The asteroid bodies are lipids bound up with calcium, phosphate and oxygen. Electron microscopy shows a crystalline, apatite-like (bone-mineral-like) structure.

  3. Exhibit C

    They move with your eye

    The bodies are anchored in the gel, so they sway when the eye or head moves and then settle back. They don't drift freely like ordinary floaters.

  4. Exhibit D

    About 1 in 100 people

    A meta-analysis of about 105,000 people found a prevalence of 0.75%. Large eye studies report about 1–1.2%, and an autopsy series about 2%.

  5. Exhibit E

    Age, men and one eye

    Prevalence rises from about 0.3% under age 40 to about 3% at 80 and over. Men are about 1.8 times as likely to have it, and in most cases only one eye is affected.

  6. Exhibit F

    Diabetes? Probably not

    A link to diabetes is often cited but controversial. Large population studies, including Blue Mountains, Beaver Dam and Beijing, found no significant association.

  7. Exhibit G

    Usually harmless

    Asteroid hyalosis usually affects vision less than other vitreous opacities and doesn't need treatment. It matters mostly because the glittering bodies can make it hard for doctors to see and image the retina behind them.

Questions people ask about Starry Eyed

Where in the eye are asteroid bodies found?

They sit in the vitreous humor, the gel that fills the eyeball.

Source: Write-up · Exhibit A (Stars in the vitreous) · Prevalence and associations of asteroid hyalosis: the Beijing Eye Study (BMC Ophthalmology, 2022); Asteroid Hyalosis (EyeWiki, American Academy of Ophthalmology)

What are asteroid bodies mainly made of?

They're lipids complexed with calcium, phosphate and oxygen, with an apatite-like structure.

Source: Write-up · Exhibit B (What they're made of) · Ultrastructure and composition of asteroid bodies (Winkler & Lünsdorf, IOVS 2001; PubMed); Global prevalence of asteroid hyalosis: systematic review and meta-analysis (Acta Ophthalmologica, 2020); Prevalence and associations of asteroid hyalosis: the Beijing Eye Study (BMC Ophthalmology, 2022)

Roughly how common is asteroid hyalosis?

Studies put it around 0.75–1.2% of people.

Source: Write-up · Exhibit D (About 1 in 100 people) · Global prevalence of asteroid hyalosis: systematic review and meta-analysis (Acta Ophthalmologica, 2020); Asteroid hyalosis: pathogenesis and prospects for prevention (Eye, 2008)

Which group is asteroid hyalosis most common in?

Prevalence climbs from about 0.3% under 40 to about 3% at 80+.

Source: Write-up · Exhibit E (Age, men and one eye) · Global prevalence of asteroid hyalosis: systematic review and meta-analysis (Acta Ophthalmologica, 2020); Asteroid hyalosis: pathogenesis and prospects for prevention (Eye, 2008); Asteroid Hyalosis (EyeWiki, American Academy of Ophthalmology)

Is asteroid hyalosis firmly linked to diabetes?

The link is often cited but large population studies found no significant association.

Source: Write-up · Exhibit F (Diabetes? Probably not) · Prevalence and associations of asteroid hyalosis: the Beijing Eye Study (BMC Ophthalmology, 2022); Asteroid hyalosis: pathogenesis and prospects for prevention (Eye, 2008); Global prevalence of asteroid hyalosis: systematic review and meta-analysis (Acta Ophthalmologica, 2020)

Test Your Knowledge

All quizzes →

5 questions, all from this case file. Answers are revealed instantly.

  1. Where in the eye are asteroid bodies found?

    1. The cornea
    2. The lens
    3. The vitreous gel
    4. The tear film
    Show the answer

    Answer: C. The vitreous gel They sit in the vitreous humor, the gel that fills the eyeball. Source: Write-up · Exhibit A (Stars in the vitreous) · Prevalence and associations of asteroid hyalosis: the Beijing Eye Study (BMC Ophthalmology, 2022); Asteroid Hyalosis (EyeWiki, American Academy of Ophthalmology)

  2. What are asteroid bodies mainly made of?

    1. Iron and protein
    2. Calcium, phosphate and lipids
    3. Ice crystals
    4. Cholesterol only
    Show the answer

    Answer: B. Calcium, phosphate and lipids They're lipids complexed with calcium, phosphate and oxygen, with an apatite-like structure. Source: Write-up · Exhibit B (What they're made of) · Ultrastructure and composition of asteroid bodies (Winkler & Lünsdorf, IOVS 2001; PubMed); Global prevalence of asteroid hyalosis: systematic review and meta-analysis (Acta Ophthalmologica, 2020); Prevalence and associations of asteroid hyalosis: the Beijing Eye Study (BMC Ophthalmology, 2022)

  3. Roughly how common is asteroid hyalosis?

    1. About 1 in 10 people
    2. About 1 in 100 people
    3. About 1 in 10,000 people
    4. About 1 in a million
    Show the answer

    Answer: B. About 1 in 100 people Studies put it around 0.75–1.2% of people. Source: Write-up · Exhibit D (About 1 in 100 people) · Global prevalence of asteroid hyalosis: systematic review and meta-analysis (Acta Ophthalmologica, 2020); Asteroid hyalosis: pathogenesis and prospects for prevention (Eye, 2008)

  4. Which group is asteroid hyalosis most common in?

    1. Children
    2. Teenagers
    3. Older adults
    4. Newborns
    Show the answer

    Answer: C. Older adults Prevalence climbs from about 0.3% under 40 to about 3% at 80+. Source: Write-up · Exhibit E (Age, men and one eye) · Global prevalence of asteroid hyalosis: systematic review and meta-analysis (Acta Ophthalmologica, 2020); Asteroid hyalosis: pathogenesis and prospects for prevention (Eye, 2008); Asteroid Hyalosis (EyeWiki, American Academy of Ophthalmology)

  5. Is asteroid hyalosis firmly linked to diabetes?

    1. Yes, it's caused by diabetes
    2. No, large studies found no significant link
    3. Only in children
    4. Only in women
    Show the answer

    Answer: B. No, large studies found no significant link The link is often cited but large population studies found no significant association. Source: Write-up · Exhibit F (Diabetes? Probably not) · Prevalence and associations of asteroid hyalosis: the Beijing Eye Study (BMC Ophthalmology, 2022); Asteroid hyalosis: pathogenesis and prospects for prevention (Eye, 2008); Global prevalence of asteroid hyalosis: systematic review and meta-analysis (Acta Ophthalmologica, 2020)

Cite this case file

Easterling, Marcus. "Starry Eyed." The Detail Department (DetailEnjoyer), case file DD-001, last updated Oct 17, 2026. https://detailenjoyer.com/case/starry-eyed/

Permalink: https://detailenjoyer.com/case/starry-eyed/ · Last updated

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