Privacy Policy

Who operates this site

Eyetoolkit is a personal website operated by an individual developer ("Eyetoolkit", "we"). It exists to provide free, vendor-neutral ophthalmology calculation and education tools.

What we collect

We deliberately minimize data collection. There is no account, login, or mandatory sign-up.

• Automatically: anonymized usage data via analytics (for example page views, approximate region, device type, and truncated IP). This is used only to understand and improve the site.
• Advertising: when you consent through our cookie banner, Google AdSense and its partners may store and read cookies and similar identifiers to show ads. See our Cookie Policy.
• Contact: if you email us, we receive the content of your message and your email address, used solely to reply.

What we do NOT do

We do not sell your personal data. We do not share data except with processors needed to run the site (analytics and advertising providers) under contractual safeguards.

Legal bases (GDPR / UK GDPR)

If you are in the EEA or the UK: analytics relies on legitimate interest; advertising cookies and non-essential tracking rely on your consent, managed through our consent banner.

Your rights

You may request access, correction, deletion, restriction, and portability of your data, and object to processing. California residents may opt out of the "sale" or "sharing" of personal information. To exercise any right, contact eyetoolkit@foxmail.com.

International transfers

The site is hosted outside the EEA/UK and uses providers (including Google) whose servers may be located in the United States. Transfers rely on the providers' standard contractual safeguards.

Children

This site is not directed to children (under 16 in the EU/UK, under 13 in the US). We do not knowingly collect data from children.

Retention & changes

We keep contact correspondence only as long as needed to respond. This policy may change; the effective date above is updated on revision.

Effective date: 2026-09-06