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Terms of Use

Last updated: May 31, 2026

Please read these Terms of Use (“Terms”) carefully before using VertexLensCalc, accessible at vertexlenscalc.com (the “Website”), operated by VertexLensCalc (“we,” “us,” or “our”).

By accessing or using the Website, you agree to be bound by these Terms. If you do not agree to these Terms, please discontinue use of the Website immediately.

1. Nature of the Website

VertexLensCalc is an independent, privately operated digital tool website. It is not affiliated with, endorsed by, or representing any medical institution, optical authority, government body, or licensed healthcare provider. The Website provides informational and computational tools for general educational and convenience purposes only.

2. Acceptance of Terms

By using this Website, you confirm that you are at least 13 years of age, that you have read and understood these Terms, and that you agree to be legally bound by them. If you are using the Website on behalf of an organization, you represent that you have the authority to bind that organization to these Terms.

3. Use of the Calculator Tool

The vertex distance calculator provided on this Website is intended solely as an informational reference tool. By using the calculator, you acknowledge and agree that:

  • The results generated are estimates only and do not constitute a medical prescription, clinical advice, or a recommendation to purchase or use any specific contact lens product.
  • You will not use the results as a substitute for a professional eye examination, a licensed optometrist’s prescription, or qualified medical advice.
  • Contact lenses require additional fitting parameters (base curve, diameter, lens brand compatibility) that this tool does not provide and that can only be determined by a qualified eye care professional.
  • Any reliance you place on the calculator results is strictly at your own risk.

4. Intellectual Property

All content on this Website — including but not limited to text, graphics, logos, icons, code, design, and layout — is the property of VertexLensCalc and is protected by applicable copyright and intellectual property laws.

You may not reproduce, distribute, modify, create derivative works from, publicly display, or exploit any content from this Website without our prior written consent, except for personal, non-commercial use with appropriate attribution.

5. Permitted Use

You agree to use this Website only for lawful purposes and in a manner that does not infringe on the rights of others. You may not:

  • Use the Website in any way that violates applicable local, national, or international laws or regulations
  • Attempt to gain unauthorized access to any part of the Website or its underlying systems
  • Transmit any unsolicited or unauthorized advertising or promotional material (spam)
  • Use automated tools (scrapers, bots, crawlers) to extract content from the Website without our express written permission
  • Impersonate any person or entity or misrepresent your affiliation with any person or entity

6. Disclaimer of Warranties

The Website and its content are provided on an “as is” and “as available” basis without any warranties of any kind, either express or implied, including but not limited to warranties of merchantability, fitness for a particular purpose, accuracy, or non-infringement.

We do not warrant that:

  • The Website will be uninterrupted, error-free, or free of viruses or other harmful components
  • The results obtained from the calculator will be accurate, complete, or reliable for any specific purpose
  • Any errors in the Website will be corrected

7. Limitation of Liability

To the fullest extent permitted by applicable law, VertexLensCalc and its operators shall not be liable for any indirect, incidental, special, consequential, or punitive damages, including but not limited to:

  • Loss of profits, revenue, or data
  • Physical harm, vision problems, or health consequences arising from reliance on calculator results
  • Any errors or omissions in the content of the Website
  • Any interruption or cessation of transmission to or from the Website

In no event shall our total liability to you for all claims arising from your use of the Website exceed the amount you paid to use the Website (which, given the Website is free, shall be zero).

8. Third-Party Links and Services

The Website may contain links to third-party websites or services. These links are provided for your convenience only. We have no control over the content or practices of those sites and accept no responsibility for them or for any loss or damage that may arise from your use of them. We encourage you to review the terms and privacy policies of any third-party sites you visit.

9. Advertising

This Website displays advertisements served by Google AdSense and potentially other third-party advertising networks. The presence of an advertisement does not constitute an endorsement of the advertised product or service by VertexLensCalc. We are not responsible for the content of third-party advertisements.

10. Modifications to the Website and Terms

We reserve the right to modify or discontinue the Website (or any part thereof) at any time without notice. We also reserve the right to update these Terms at any time. The updated Terms will be posted on this page with a revised “Last updated” date. Your continued use of the Website after any changes constitutes acceptance of the new Terms.

11. Governing Law

These Terms shall be governed by and construed in accordance with applicable laws. Any disputes arising in connection with these Terms or the Website shall be subject to the exclusive jurisdiction of the competent courts in the applicable jurisdiction.

12. Severability

If any provision of these Terms is found to be unenforceable or invalid, that provision will be limited or eliminated to the minimum extent necessary so that the remaining Terms will otherwise remain in full force and effect.

13. Contact Us

If you have any questions about these Terms of Use, please contact us: