article_snippet.sent: As this image gets larger, what do you see?
article_snippet.sent: Most people will pick out a phantom-like picture of Einstein.
article_snippet.sent: But if you see a Hollywood pin-up, you may need a trip to the opticians.
article_snippet.sent: Up close, we’re generally able to pick up fine details like Einstein’s moustache and wrinkles.
article_snippet.sent: At normal screen viewing distance you should see the face of Albert Einstein.
article_snippet.sent: At normal viewing distance, you may see a dolphin.
article_snippet.sent: At a distance, all that will be seen are two normal portraits .