# Human Fovea Detector

7 Hacker News commenters recommended Human Fovea Detector and 0 criticized it, November 2025 to November 2026. It was recommended in 1 of 13 months.

**Verdict:** Impressive interactive demo that shows the true diameter of your visual focus. Keep it open only briefly, since people advise against having it open for long.

## Why people recommend it

- Impressive, informative demo (3 comments): "it helps you identify the true diameter of your visual focus" ([source](https://news.ycombinator.com/item?id=45910645)) "Amazing - but iPhone screen is too small. Works on my iPad." ([source](https://news.ycombinator.com/item?id=45909244)) "This is a truly incredible demo." ([source](https://news.ycombinator.com/item?id=45910380))

## What people warn about

- Wants a fullscreen URL parameter (1 comments): "I wish there was an url parameter to share this fullscreen right away!" ([source](https://news.ycombinator.com/item?id=45914207))
- Advised not to keep open long (1 comments): "Don't recommend having this open for too long." ([source](https://news.ycombinator.com/item?id=45912873))

## Alternatives hackers recommend

- [Catch a Bird](https://hackerapproved.com/p/catch-a-bird.md): 39 recommend
- [Koi.rest](https://hackerapproved.com/p/koi-rest.md): 18 recommend
- [neal.fun](https://hackerapproved.com/p/neal-fun.md): 15 recommend
- [Zombo.com](https://hackerapproved.com/p/zombo-com.md): 8 recommend
- [Pumpkins.sh](https://hackerapproved.com/p/pumpkins-sh.md): 7 recommend

## Cite as

Hacker Approved, "Human Fovea Detector", https://hackerapproved.com/p/human-fovea-detector/ (counts from 1,795,640 Hacker News comments, November 2025 to November 2026).