emmetria
Interactive clinical optics

Optics you
can move.

A plug-and-play library of interactive optics sandboxes for ophthalmology. Open one, drag the parameters, and watch the physics respond — from your first lecture to the operating room.

Research preview · 7 sandboxes live
Physically correct·Vendor-neutral·Built by ophthalmologists·7 live · 17 planned
How it works

One loop, every time.

No account, no syllabus, no order to follow. Open any sandbox and you’re already doing all four.

01

Open

Pick a sandbox. Each one is a single, standalone optics problem.

02

Drag

Grab the object, the lens, the streak. Every parameter is in your hands.

03

Watch

The physics responds in real time — image, vergence, power, all live.

04

Check

Type your own numbers to check your work, then share the exact state by link.

Featured sandboxes

Start with these.

Browse all 24
Browse by domain

Four domains, one flat library.

Four ways to find a sandbox, not four levels. Open a domain to narrow the list, then dive into whatever you want.

Who it’s for

One sandbox, the whole spectrum.

There are no beginners or experts here — only the optics and whatever you’re trying to work out. A first-year medical student and a cataract surgeon open the very same sandbox.

The student

after a lecture

Just saw thin lenses on a slide. Drag the object across the focal point and watch the image flip — the concept finally lands.

The resident

mid-clinic

Unsure on a transposition between patients. Type the numbers into the power cross and see, in seconds, whether they check out.

The fellow

refining

Pushing a multi-lens system to its edges to build intuition for where the simple model starts to break down.

The surgeon

two minutes before a case

Brushing up on the vergence that drives an IOL formula — no course to wade through, just the optics.

What it is

A sandbox you drop into. Every module is one standalone, physically-correct simulation — open it, move the controls, and the optics responds in real time. Type your own numbers to check your work, and share the exact state with a link.

What it isn’t

Not a course, not a quiz bank, not a marketing simulator, and not sorted by training level. Just one flat library you can open in any order, as often as you like.

Ready when you are

Start with Thin Lenses.

Drag the object across the focal point and watch the image flip. It’s the fastest two minutes in optics.