It seems that every new optical illusion that crops up online claims to be trickier than the last.
But apparently only those with 'perfect perception' will be able to spot the sailor's wife in this vintage illustration, reports the Daily Mail.
The image, posted to Playbuzz by user Jenny Grisham, features a sailor looking out to sea for his wife - but it appears his darling Buttercup may not be as far away as he thinks.
In fact there's a specific trick to this puzzle - if you want to find the woman you need to look at it upside down.