Terms of Use
Last updated: June 16, 2026
Welcome. By accessing or using this website ("the site") and its pupillary distance (PD) measurement tool, you agree to these Terms of Use. If you do not agree, please do not use the site.
What this site provides
This site offers a free, browser-based tool for estimating pupillary distance, along with informational articles about pupillary distance and eyewear. The tool is provided as a convenience for personal use.
Not medical advice
The site and its tool are provided for general informational purposes only and are not a substitute for professional medical or optometric advice, diagnosis, or treatment. The PD measurement produced by the tool is an estimate generated by software, not a clinical measurement taken by a qualified professional.
Always seek the advice of an optician, optometrist, or other qualified eye care professional with any questions you may have regarding your vision, your prescription, or your eyewear. Never disregard professional advice or delay seeking it because of something you have read or measured on this site. For strong or complex prescriptions, a professional measurement is recommended.
Accuracy and "as is" basis
We work to make the measurement tool as useful as possible, but PD measured at home with any consumer tool is an estimate, and its accuracy depends on factors such as lighting, camera quality, and how carefully you follow the instructions. We make no guarantee that any measurement will be accurate or suitable for any particular purpose.
The site and tool are provided "as is" and "as available," without warranties of any kind, whether express or implied, including but not limited to warranties of accuracy, merchantability, or fitness for a particular purpose.
Your responsibility
You are responsible for how you use any measurement obtained from this site, including any decision to order eyewear based on it. We strongly recommend verifying important measurements with a qualified professional before purchasing glasses, particularly for strong prescriptions, progressive lenses, or bifocals. We are not responsible for eyewear that does not fit or perform as expected.
Limitation of liability
To the fullest extent permitted by law, we will not be liable for any direct, indirect, incidental, consequential, or other damages arising out of or related to your use of, or inability to use, this site or its tool — including, without limitation, any costs of eyewear ordered using a measurement from this site.
Intellectual property
The content on this site, including articles and design, is owned by us or our licensors and is provided for your personal, non-commercial use. You may not reproduce or republish substantial portions of it without permission.
Third-party links and advertising
This site may contain advertising and links to third-party websites. We are not responsible for the content, products, or practices of third parties. Your interactions with advertisers or third-party sites are solely between you and them.
Changes to these terms
We may update these Terms of Use from time to time. Changes take effect when we post them, and we will update the "last updated" date above. Your continued use of the site after changes means you accept the revised terms.
Contact
If you have questions about these Terms, you can reach us at contact@pdmeasure.com.
This page is provided for general informational purposes and does not constitute legal advice.