London School of Hygiene & Tropical Medicine Cookie Policy for the Rapid Assessment of Avoidable Blindness (RAAB) repository website


What are cookies?

Cookies are small pieces of data given to your web browser by a website which may be stored as text files on your computer. Cookies are not programs and cannot collect information from your computer. They do not damage your computer and are defined as "a piece of text stored on a user's computer by their web browser".

A website may send cookie data to your web browser which may save it if your web browser's preferences allow it to do so. To protect your privacy your web browser only returns a cookie to the website that sent you the cookie and does not send it to any other website. A website cannot access your cookie directory or information on your computer, instead relevant cookies are included by your web browser within each request you make to the website. A website can only obtain cookie data that your web browser sends to it.

Overall, cookies help us provide you with a better website by enabling us to monitor which pages you find useful and which you do not. A cookie in no way gives us access to your computer or any information about you, other than the data you choose to share with us.

How we use cookies

We use cookies for a number of different purposes. Some cookies are necessary for technical reasons and some enable a personalized experience for both visitors and registered users.

Many of the cookies we use are only set if you are a registered website user (so you don’t have to log in every time, for example), while others are set whenever you visit one of our websites, irrespective of whether you have an account. We’d like to set Google Analytics cookies to help us improve our website by collecting and reporting information on how you use it. The cookies collect information in a way that does not directly identify anyone.

Which cookies does this site use?

The cookies we use are set out in the following table.

Necessary Necessary cookies help make a website usable by enabling basic functions like page navigation and access to secure areas of the website. The website cannot function properly without these cookies.
Cookie name Purpose
cookie-agreed-version Stores the user's cookie consent state for the current domain
rc::a This cookie is used to distinguish between humans and bots. This is beneficial for the website, in order to make valid reports on the use of their website
rc::c This cookie is used to distinguish between humans and bots
Google Analytics Google Analytics cookies help website owners to understand how visitors interact with websites by collecting and reporting information anonymously.
Cookie name Purpose
_ga Registers a unique ID that is used to generate statistical data on how the visitor uses the website
_gat  Used by Google Analytics to throttle request rate
_gid  Registers a unique ID that is used to generate statistical data on how the visitor uses the website


Controlling cookies

Visitors may wish to restrict the use of cookies or completely prevent them from being set. The cookies pop up that appears when you first visit this site lets you control which of the non-essential cookies are in use when you browse the site. Currently, the only non-essential cookies in use are analytics cookies. Details of the specifics of these cookies will be provided in the near future.

In addition to this, most browsers provide for ways to control cookie behaviour such as the length of time they are stored – either through built-in functionality or by utilizing third party plugins. If you disable cookies, please be aware that some of the features of our service may not function correctly.

To find out more about cookies, visit

Find out how to manage cookies on popular browsers using the following links:

Changes to the Cookie policy

We may update this policy from time to time. If we make significant changes we will let you know but please regularly check this policy to ensure you are aware of the most updated version.