Privacy Policy

Effective Date: 10 April 2020

EyePhysics LLC (the owner of & TDF Calc) is committed to maintaining your confidence and trust with respect to the privacy of the Personal Data we collect from you.

For the purpose of this Privacy Policy, 'Personal Data' means any information relating to an identified or identifiable natural person; an identifiable natural person is one who can be identified, directly or indirectly, in particular by reference to an identifier such as a name, an identification number, location data, an online identifier or to one or more factors specific to the physical, physiological, genetic, mental, economic, cultural or social identity of that natural person.

Please read this privacy policy carefully to understand our practices about how we collect, use, and share your Personal Data.


This privacy policy describes how the Personal Data that is collected when you visit our “Services” (our website, apps or other digital products) will be used.


The Policy collects information from you in two ways: 1) directly from your input and 2) automatically through use of our services.

The types of Personal Data that the Service collects directly from you may include:

Information You Provide

Information Collected Automatically

The Service also automatically collects, through our servers and the use of cookies (small text files sent to your computer), web beacons (also known as clear or single pixel .gifs) and other technologies, information that tells us how you use the Service, such as:

When you use our Services, in addition to information described in our Policy, such as your profile and contact information, we may automatically collect certain information from your device including your precise geolocation, information about your device such as the device type, device ID, operating system, wireless service provider, and information about the operation of our application and your usage of our application, including features you used, pages you viewed, and when and for how long you used the application. By using the Eye Physics LLC Services, you agree that we may collect this information and use, transmit, process, and store that information as described in our Privacy Policy including to provide and improve our Services.

We may use and disclose information that does not reveal your identity or permit direct association with any specific individual, such as browser and device information, anonymous usage data, and aggregated information, for any purpose, except where we are restricted by law. If we combine non-Personal Data with Personal Data, the combined information will be treated as Personal Data for as long as it remains combined.

You can control cookies through your browser's settings and other tools. However, if you block certain cookies, you may not be able to register, login to the Services, access certain parts of the Services or make full use of the Services.


We may use your Personal Data to:

We may on occasion also match or combine the Personal Data that you provide with information that we obtain from other sources or that is already in our records, whether collected online or offline or by predecessor or affiliated group companies, for the purposes described above.


We may share your Personal Data with:

We also may share your Personal Data with our affiliated group companies worldwide and with societies, sponsors, and other non-affiliated third parties that wish to send you information about their products and services that may be of interest to you as determined by your choices in managing your communications preferences following the process described below.

We also may need to disclose your Personal Data:

The Service may let you post and share Personal Data, comments, materials and other content. Any information you disclose publicly may be collected and used by others, may be indexable by search engines, and might not be able to be removed. Please be careful when disclosing Personal Data in these public areas.


You can contact us directly at if you wish to opt-out of any of the communications you receive from us. We reserve the right to notify you of changes or updates to the Service whenever necessary.


You have a right to be informed of Personal Data processed by the Service, a right to rectification/correction, erasure and restriction of processing. Upon request, you have the right to receive a structured, common and machine-readable format of the Personal Data you provided to us. We may need to request specific information from you to help us confirm your identity and ensure your right to access your Personal Data (or to exercise any of your other rights). This is a security measure to ensure that you are the data subject entitled to receive such Personal Data.

You will not have to pay a fee to access your Personal Data. However, we may charge a reasonable fee if your request is clearly unfounded, repetitive, or excessive. Alternatively, we may refuse to comply with your request in these circumstances.

Where you have provided consent, you may withdraw it at any time, without affecting the lawfulness of the processing that was carried out prior to withdrawing it. Whenever you withdraw consent, you acknowledge and accept that this may have a negative influence on the quality of the Service. We will endeavor to fulfill your request within 30 days but some Personal Data may persist in backup copies for a certain period of time and may be retained as necessary for legitimate business purposes or to comply with our legal obligations. You further agree that Eye Physics, LLC shall not be held liable with respect to any loss and/or damage to your Personal Data if you choose to withdraw consent.

To exercise any of the rights mentioned in this Privacy Policy and/or in the event of questions or comments relating to the use of Personal Data, you may contact Eye Physics LLC support team:

You have the right to lodge a complaint with the data protection authority in your jurisdiction.


Eye Physics takes precautions to safeguard your Personal Data against loss, theft and misuse and unauthorized access, disclosure, alteration, and destruction through the use of appropriate administrative, physical and technical security measures.

Our website and applications are scanned on a regular basis for security holes and known vulnerabilities in order to make your visit to our site as safe as possible. Your Personal Data is contained behind secured networks and is only accessible by a limited number of persons who have special access rights to such systems, and are required to keep the information confidential. We implement a variety of security measures when a user enters, submits, or accesses their information to maintain the safety of your Personal Data.

Personal Data and usage data is stored as long as is necessary for the purpose(s) for which we originally collected it. We may also retain information as required by law.


Your Personal Data may be transferred to other countries for processing. By using the Service, you consent to the transfer of information to countries outside of your country of residence, which may have different Personal Data protection rules than in your country.


We may change this privacy policy from time to time. Any changes will be posted on this page with an updated revision date.


Occasionally, at our discretion, we may include or offer third-party products or services on our website. These third-party sites have separate and independent privacy policies. We, therefore, have no responsibility or liability for the content and activities of these linked sites. Nonetheless, we seek to protect the integrity of our site and welcome any feedback about these sites.

At this time we are NOT using any third-party links

L) Compliance with State and Federal Laws

EU General Data Protection Regulation (“GDPR”)

We carry out all data control and processing operations in strict compliance with the GDPR. We use a limited number of external service providers that are trusted and meet high data protection and security standards for certain tasks such as technical data analysis, processing and/or storage offerings. We only share information with them that is required for the services offered, and we contractually bind them to keep any information we share confidential. We will only pass your data on to third parties without your express consent or if we are obliged to do so by statutory law or an instruction a public authority or court.

California Online Privacy Protection Act

CalOPPA is the first state law in the nation to require commercial websites and online services to post a privacy policy. The law’s reach stretches well beyond California to require a person or company in the United States (and conceivably the world) that operates websites collecting personally identifiable information from California consumers to post a conspicuous privacy policy on its website stating exactly the information being collected and those individuals with whom it is being shared, and to comply with this policy. – See more at:

According to CalOPPA we agree to the following:

Users can visit our site or apps anonymously. Once this privacy policy is created, we will add a link to it on our home page or as a minimum on the first significant page after entering our website (a link for the privacy policy for the app will be on the app store listing). Our Privacy Policy link includes the word 'Privacy' and can be easily be found on the page specified above. Users will be notified of any privacy policy changes when they login to their account.

How does our site handle “do not track” signals?:

We honor “do not track” signals and do not track, plant cookies, or use advertising when a Do Not Track (DNT) browser mechanism is in place.

Does our site allow third-party behavioral tracking?

It’s also important to note that we allow third-party behavioral tracking to improve our users’ experience. We are however NOT using any at this time.

COPPA (Children Online Privacy Protection Act)

When it comes to the collection of Personal Data from children under 13, the Children’s Online Privacy Protection Act (COPPA) puts parents in control. The Federal Trade Commission, the nation’s consumer protection agency, enforces the COPPA Rule, which spells out what operators of websites and online services must do to protect children’s privacy and safety online. We do not specifically market to children under 13.

Fair Information Practices

The Fair Information Practices Principles form the backbone of privacy law in the United States and the concepts they include have played a significant role in the development of data protection laws around the globe. Understanding the Fair Information Practice Principles and how they should be implemented is critical to comply with the various privacy laws that protect Personal Data.

In order to be in line with Fair Information Practices we will take the following responsive action, should a data breach occur:

We will notify the users via email within 7 business days. We will notify the users via in-site notification Within 7 business days. We also agree to the Individual Redress Principle, which requires that individuals have a right to pursue legally enforceable rights against data collectors and processors who fail to adhere to the law. This principle requires not only that individuals have enforceable rights against data users, but also that individuals have recourse to courts or government agencies to investigate and/or prosecute non-compliance by data processors.


The CAN-SPAM Act is a law that sets the rules for commercial email, establishes requirements for commercial messages, gives recipients the right to have emails stopped from being sent to them, and spells out tough penalties for violations.

We collect your email address in order to provide you with occasional calculator or service updates, which you can easily opt-out from.

To be in accordance with CAN-SPAM we agree to the following:

If at any time you would like to unsubscribe from receiving future emails, you can email us at and we will promptly remove you from ALL correspondence.


If you have any questions, comments or requests regarding this privacy policy or our processing of your information, please contact:

Eye Physics LLC
ATTN: Privacy Officer
11401 Kensington Rd
Los Alamitos, CA, 90720