Contact WorldLensia at info@worldlensia.com for article questions, source corrections, research feedback or website issues.
Report an error or request a clarification
Include the article URL, the passage or calculation you are questioning, and a link to the original source when available. For data questions, identify the survey year, geographic area, unit and source release so the comparison can be checked on the same basis.
Suggest a research question
Tell us the question you want answered and which population, place or time period matters. Browse our research guides and worksheets first, or read our sources and methodology to understand how comparisons are documented.
Privacy and website issues
For a broken link or display problem, include the page URL and describe what happened. For a privacy enquiry, identify the relevant interaction and read our privacy information. Do not send passwords, payment details, identity documents or sensitive medical information in your initial message.