Google's ARDA eye-screening AI tops one million patients

Google's ARDA diabetic retinopathy screening model has crossed one million patients across sites in India, Thailand and Australia, according to a Comment published 23 September 2026 in Nature Medicine.

The three anchor sites are the Aravind Eye Care System in Madurai, Rajavithi Hospital in Bangkok, and Lions Outback Vision at the Lions Eye Institute in Western Australia. The piece is co-authored by Google's Richa Tiwari and Yossi Matias alongside clinicians including Kim Ramasamy at Aravind, Paisan Ruamviboonsuk at Rajavithi and Angus Turner at Lions Outback Vision. Two of the researchers on our radar flagged the paper the same day it went up.

The authors cast it as a deployment-lessons reflection, writing that 'scaling a successful deep learning tool across three highly distinct settings' offers 'cross-cutting insights that may inform the expansion of healthcare artificial intelligence globally.'

What this is not: a new clinical trial. The Comment publishes no fresh per-site accuracy numbers, no cost-per-screen, and no breakdown of whether patients flagged by ARDA actually reached treatment. It is a reflection from the vendor and its three clinical partners after years in the field, offered as a template rather than an endpoint.