Pupilla vs EOM Sim
Quick answer
EOM Sim is a 3D mobile app from Western University of Health Sciences in which each extraocular muscle and cranial nerve can be switched individually to simulate pathology and clinical exams; its app-hub page asks for a WesternU login to download and lists a 3 GB RAM minimum. Pupilla covers the same topic in the browser with binocular 3D eye movements, a 3D anatomy model of the six muscles and orbit, and a virtual patient with third, fourth and sixth nerve palsies, INO and gaze palsies that you examine with the H-test and cover tests.
Try Pupilla freeSide-by-side comparison
| Feature | Pupilla | EOM Sim |
|---|---|---|
| Made by | Pupilla (independent educational project) | Western University of Health Sciences (EdTech) |
| Platform | Any modern browser; nothing to install | Mobile app; at least 3 GB RAM; about 100 MB |
| Access | Free in the browser; no account, download or install | Download requires a WesternU login on its app-hub page |
| Control individual muscles / nerves | Choose a nerve palsy or muscle condition; the 3D lab shows each muscle's action in every gaze | Yes — each muscle and cranial nerve individually |
| Clinical tests on the same patient | H-test, cover–uncover and alternate cover, Hirschberg and Krimsky with prisms, pupil exam | Simulates "various pathologies and clinical examinations"; pupil response rendered |
| Brainstem gaze disorders | INO, one-and-a-half syndrome, gaze palsies, nystagmus | Not listed on its page |
| Language | English and Arabic (full interface, guides and FAQ) | Not listed |
Choose EOM Sim if…
- You are a WesternU student and your course already uses it.
- You want to switch each muscle or nerve on and off directly in a native app.
Choose Pupilla if…
- You cannot install apps or do not have a university login.
- You want to go from anatomy to a full bedside motility exam — H-test, cover test, prisms — on one virtual patient.
- You study in Arabic.
Frequently asked questions
What is the best way to learn the actions of the extraocular muscles?
Learn each muscle's primary, secondary and tertiary action, then watch them in the 3D extraocular muscle simulator and test yourself with the H-test on a patient with a nerve palsy. The extraocular muscle guide summarises origins, insertions and innervation (LR6 SO4, the rest III).
Is there a free online cranial nerve palsy simulator?
Yes. Pupilla's eye exam simulator includes third, fourth and sixth nerve palsies for the right or left eye, free in the browser. See the cranial nerve palsy guide.
Sources for this comparison
Other comparisons
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For education and training only. Pupilla is not a medical device and must not be used for diagnosis or treatment decisions.