This work began some years ago (see here previously). Researchers from Tel Aviv University and Sheba Medical Center have developed an artificial intelligence-based system that can detect anemia and estimate key blood markers using a brief video scan of blood vessels in the eye.

https://www.aftau.org/news_item/tau-researchers-develop-an-ai-eye-scan-technique-to-detect-anemia-and-assess-key-blood-markers/

https://www.nature.com/articles/s41746-026-02598-2