Privacy Policy

Last updated: April 19, 2026

MyopiaTracker is operated by iCare Enterprises, LLC.

Authentication & Cloud Sync (Optional)

Clinicians may optionally create an account to sync patient data across devices. When you do:

• Clinician accounts: Email used for authentication only. Practice name and city stored optionally. No personal names stored.
• Patient/family accounts: Google or Apple Sign-In only. We receive an opaque user ID — never your name, photo, or email.
• Optional reference email: If entered, immediately hashed with SHA-256 before storage. Original email is unrecoverable by us.
• Patient access codes: Stored as one-way SHA-256 hashes only. Plain codes are shown once and never stored.
• Clinical data: Axial length, refraction, treatment records stored against opaque IDs. No names, DOB, or contact information.
• Data deletion: Email support@myopiatracker.com to delete all your data. Processed within 30 days.

Cloud sync is powered by Google Firebase, located in the United States. By using cloud sync you agree to Firebase's data processing terms.

Data We Do Not Collect

• No patient names, ages, or clinical measurements are sent to our servers
• No cookies are set for tracking or analytics purposes
• No third-party analytics scripts are embedded in the app itself. Static content/SEO pages use Google Analytics (GA4, ID: G-VYQ6ZYZTVX) for aggregate traffic measurement; no patient data is included in analytics events
• No account creation is required — there is no user database
• The "Family Share" link (free tier) encodes patient summary data in the URL as a query string — nothing is stored server-side. The link is generated and copied by the clinician and sent manually to the family. ⚠ HIPAA Notice: Do not transmit family share links via unencrypted SMS, standard email, or non-secure messaging platforms — the URL contains clinical data that may constitute PHI. Pro plan users should use the QR code system instead, which stores data server-side and places only a short lookup token in the URL.

Local Storage

Patient visit data is saved to your device's localStorage under the key myopia_patients. This data never leaves your device unless you explicitly use the Export (JSON/CSV) or Family Share features. Exported files and shared links are your responsibility to handle in accordance with applicable privacy laws.

Browser Compatibility

MyopiaTracker is best experienced on Chrome 90+, Safari 15+, Firefox 90+, or Edge 90+. The localStorage API used for data persistence behaves consistently across all of these. Private/Incognito mode will not persist data between sessions.

Growth Curve References

Risk calculations reference the following published normative datasets:

• Tideman JWL et al. Association of Axial Length With Risk of Uncorrectable Visual Impairment for Europeans With Myopia. JAMA Ophthalmol. 2016;134(12):1355–1363.
• Tideman JWL et al. Association of Axial Length With Myopia, Retinal Detachment, Cataracts, and Glaucoma. Acta Ophthalmologica. 2018;96(3):301–309. (Normative growth curves)
• Sanz Diez P et al. Growth curves of myopia-related parameters to clinically monitor the refractive development in children. Graefes Arch Clin Exp Ophthalmol. 2019.
• He M et al. Onset and Progression of Myopia in School-Aged Children: The Shenzhen Myopia Study. JAMA Ophthalmology. 2015;133(7):768–775. (East/South Asian normative reference)

HIPAA Notice

In free mode, no patient data is transmitted to or stored on iCare Enterprises, LLC servers, and MyopiaTracker does not function as a covered entity or business associate under HIPAA in the context of data storage. However, users are responsible for ensuring their local device and any exported data comply with applicable HIPAA, GDPR, or regional clinical data regulations.

Intended Use

This tool is for educational and clinical decision support only. It is not a diagnostic device and is not FDA-cleared. Do not use as a substitute for clinical judgment or a certified biometric instrument.

Changes to This Policy

We may update this policy periodically. The "Last updated" date at the top will reflect any changes.

Contact

Questions? Email support@myopiatracker.com — we respond within 2 business days.

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