# Starry Eyed (DD-001)

> 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.

- Department: People (also Science)
- First published: 2026-04-08
- Last updated: 2026-10-17
- Permalink: https://detailenjoyer.com/case/starry-eyed/
- Author: Marcus Easterling (DetailEnjoyer), The Detail Department

## Quick facts

- **DD-001-F01**: Asteroid hyalosis is a condition in which harmless calcium-lipid bodies float inside the eye. _(Write-up · Exhibit A (Stars in the vitreous))_
- **DD-001-F02**: Asteroid hyalosis fills the eye's vitreous gel with tiny calcium-phosphate-lipid spheres that glitter like stars but rarely affect vision. _(Write-up · Exhibit A (Stars in the vitreous))_
- **DD-001-F03**: 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. _(Write-up · Exhibit E (Age, men and one eye))_

## 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. **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. **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. **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. **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. **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. **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. **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.

## Related case files

- [Tilted Town (DD-035)](https://detailenjoyer.com/case/tilted-town/): More on how your eyes can deceive you.
- [The Caracal's Ear (DD-041)](https://detailenjoyer.com/case/the-caracals-ear/): More on the senses.
- [Macrophagia (DD-044)](https://detailenjoyer.com/case/macrophagia/): Something else hiding inside your body, this time in the eye.
- [Sclerotherapy (DD-597)](https://detailenjoyer.com/case/sclerotherapy/): Another medical case

## Reel vs. record

- **Confirmed**: an eye condition; calcium/lipid 'asteroid bodies' in the vitreous gel; white-yellowish and sparkling; usually harmless, rarely affecting vision. [EyeWiki; Beijing Eye Study; IOVS 2001]
- **Nuance**: 'float in the vitreous'. The bodies are suspended in, and attached to, the vitreous gel, so they swing with eye movement and return to place. They aren't free-floating like typical floaters, which is why most people don't notice them. [Beijing Eye Study; EyeWiki]
- **Precision**: the composition is specifically calcium phosphate (apatite-like) complexed with phospholipids, not just 'calcium/lipid'. [IOVS 2001; Acta Ophthalmologica 2020]
- **Update · earlier version of this page**: its one-line summary is accurate but had no sources. This update adds 5 sources, and the quiz grows from 3 to 5 questions.

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

- Duration: 20.5 s · Published: 2026-04-07
- File: https://detailenjoyer.com/assets/videos/DW14v_6kdDE.mp4

### Transcript

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!

## Questions & answers

**Q: Where in the eye are asteroid bodies found?**  
A: 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))_

**Q: What are asteroid bodies mainly made of?**  
A: 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))_

**Q: Roughly how common is asteroid hyalosis?**  
A: 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))_

**Q: Which group is asteroid hyalosis most common in?**  
A: 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))_

**Q: Is asteroid hyalosis firmly linked to diabetes?**  
A: 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))_

## Sources

- [Asteroid Hyalosis (EyeWiki, American Academy of Ophthalmology)](https://eyewiki.aao.org/Asteroid_Hyalosis_(AH))
- [Asteroid hyalosis: pathogenesis and prospects for prevention (Eye, 2008)](https://www.nature.com/articles/eye200835)
- [Ultrastructure and composition of asteroid bodies (Winkler & Lünsdorf, IOVS 2001; PubMed)](https://pubmed.ncbi.nlm.nih.gov/11274065/)
- [Global prevalence of asteroid hyalosis: systematic review and meta-analysis (Acta Ophthalmologica, 2020)](https://doi.org/10.1111/aos.14465)
- [Prevalence and associations of asteroid hyalosis: the Beijing Eye Study (BMC Ophthalmology, 2022)](https://link.springer.com/article/10.1186/s12886-022-02586-6)

## 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/