At Getty Images, we are great believers in the power of images to effect change, so I find my work in global health to be a natural extension of my business.

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Instead of having former Vice President Al Gore be the face of efforts to counter climate change, Obama needs the images of local protesters gathering to make sure that Congress deals with the issue.

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But you can change those tags and the feed of replacement images anyway you want.

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This could change once future planet-hunting instruments have provided the first images of planets around other stars.

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The software - which can be used to assist police inquiries into people who have been missing for many years - is able to manipulate facial images to change the age, sex, race or even perceived personality attributes of an individual.

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Graphic images have long played a role in driving social awareness and change, said Bruce Shapiro, executive director of the Dart Center for Journalism and Trauma.

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You can swipe through images of up to four at time, slide the specs up and down your nose, favorite ones you like, change colors, share choices with your friends, and then pick up to four the company will ship to you to try on for real at home.

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