A little girl rubs her tired eyes during the first day at the lyceum named after Moldovan writer Gheorghe Asachi in Chisinau on September 2, 2024. (Photo by Dumitru Doru/Radio Free Europe/Radio Liberty)

A jaguar eyes up a group of otters from a riverbank in Porto Jofre, North Pantanal, Brazil early November 2024. (Photo by Octavio Campos Salles/Solent News)

These adorable cats – which are twins – showcase their contrasting blue and green eyes. The cats have a condition called heterochromia iridis, which causes each eye to vary in color. (Photo by @sis.twins/Caters News Agency)

British singer-songwriter Rita Ora early May 2024 makes an eye-catching face as she promotes “The Masked Singer”, where she’s a judge. (Photo by Rita Ora/Instagram)

Fireworks explode around the London Eye wheel, the Big Ben clock tower and the Houses of Parliament to mark the beginning of the New Year in London, Britain, January 1, 2016. (Photo by Toby Melville/Reuters)

Two female holidaymakers relax on an unidentified beach of England, September 21, 1940, as a soldier, eyes straight ahead, stands guard at a barrier built as a defense against possible invasion by Germany. (Photo by AP Photo)

The double compound eyes of a male St. Mark's fly (Bibio marci), submitted by Dr. David Maitland from Feltwell, UK. (Dr. David Maitland)

The Mausoleum of the Giants, an immersive solo show of monumental sculptures by the artist Phlegm, is installed at Taylor’s Eye Witness Works in Sheffield, England on March 14, 2019. (Photo by Danny Lawson/PA Wire Press Association)