On July 8, the monarch welcomed French President Emmanuel Macron and his wife, Brigitte, to Windsor. The 76-year-old was joined by his wife, Queen Camilla, as Prince William and his wife Kate Middleton led the ceremonial start of the French state visit.
While the monarch was all smiles as he greeted the French president and his first lady, many royal watchers observed a visible bloodshot appearance in his right eye. Charles is still completing treatment for an undisclosed form of cancer.
KING CHARLES, PRINCE HARRY AT POINT OF ‘NO TURNING BACK’ AS MONARCH REFUSES RECONCILIATION: EXPERT

French President Emmanuel Macron speaks to King Charles III, whose eye is red, during a welcome ceremony at Windsor Castle as part of Macron’s state visit to the United Kingdom on July 8, 2025, in Windsor, England. (Dylan Martinez – WPA Pool/Getty Images)

