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Privacy Policy

Last updated: May 31, 2026

Welcome to VertexLensCalc (“we,” “us,” or “our”), accessible at vertexlenscalc.com. We are committed to protecting your personal information and your right to privacy. This Privacy Policy explains what information we collect, how we use it, and what rights you have in relation to it.

Please read this policy carefully. If you disagree with its terms, please discontinue use of our site.

1. Information We Collect

We collect information in the following ways:

a) Information You Provide Voluntarily

When you contact us via email or any contact form on our website, you may provide your name and email address. We use this information solely to respond to your inquiry and do not store it beyond that purpose.

b) Information Collected Automatically

When you visit VertexLensCalc, certain information is collected automatically by third-party services we use, including:

  • Log data: IP address, browser type, browser version, pages visited, time and date of visit, time spent on pages, and other diagnostic data.
  • Cookies and tracking technologies: We use cookies and similar tracking technologies to monitor activity on our website. See our Cookie Policy for full details.

c) Prescription Input Data

Any prescription values (SPH, CYL, Axis, vertex distance) you enter into our calculator tool are processed entirely within your browser. We do not transmit, store, or share any prescription data you enter. This data never leaves your device.

2. How We Use Your Information

We use the information we collect to:

  • Operate and maintain our website
  • Analyze usage patterns to improve site performance and content
  • Respond to your inquiries and support requests
  • Display advertisements through Google AdSense
  • Comply with applicable legal obligations

3. Google AdSense and Advertising

We use Google AdSense to display advertisements on our website. Google AdSense uses cookies to serve ads based on your prior visits to our site and other websites on the internet. Google’s use of advertising cookies enables it and its partners to serve ads to you based on your visit to our site and/or other sites on the internet.

You may opt out of personalized advertising by visiting Google Ads Settings. You can also opt out through the Network Advertising Initiative opt-out page.

For more information on how Google uses data from sites that use its services, please visit: How Google uses data when you use our partners’ sites or apps.

4. Google Analytics

We may use Google Analytics, a web analytics service provided by Google LLC. Google Analytics uses cookies to help the website analyze how users interact with the site. The information generated by the cookie (including your IP address) is transmitted to and stored by Google on servers in the United States.

You can prevent Google Analytics from collecting your data by installing the Google Analytics Opt-out Browser Add-on.

5. Cookies

We use cookies to enhance your experience on our site. Cookies are small text files stored on your device. We use both session cookies (which expire when you close your browser) and persistent cookies (which remain on your device until deleted or expired).

For a detailed explanation of the cookies we use and how to manage them, please refer to our Cookie Policy.

6. Third-Party Links

Our website may contain links to third-party websites. We have no control over the content, privacy policies, or practices of any third-party sites or services and assume no responsibility for them. We encourage you to review the privacy policy of any third-party site you visit.

7. Children’s Privacy

Our service is not directed to individuals under the age of 13. We do not knowingly collect personally identifiable information from children. If you are a parent or guardian and believe your child has provided us with personal information, please contact us and we will take steps to remove that information.

8. Data Retention

We retain personal information only for as long as necessary to fulfill the purposes outlined in this Privacy Policy, or as required by law. Contact form inquiries are retained only for the duration needed to respond to the inquiry.

9. Your Rights

Depending on your location, you may have the following rights regarding your personal data:

  • The right to access the personal information we hold about you
  • The right to request correction of inaccurate personal information
  • The right to request deletion of your personal information
  • The right to object to or restrict processing of your personal information
  • The right to data portability

To exercise any of these rights, please contact us at contact@vertexlenscalc.com.

10. Changes to This Privacy Policy

We may update this Privacy Policy from time to time. We will notify you of any changes by updating the “Last updated” date at the top of this page. We encourage you to review this policy periodically. Your continued use of the website after any changes constitutes your acceptance of the new policy.

11. Contact Us

If you have any questions about this Privacy Policy, please contact us: