04/19/2017 03:18 EDT | Updated 04/19/2017 03:21 EDT

Ivanka Trump's Eyes Seem To Be Changing Colour, And This Is Probably Why

The first daughter's eyes seem to change colour... a lot.

Some people have noticed something curious about Ivanka Trump: her eyes seem to change colour.

Esquire observed last fall that the first daughter’s peepers have appeared brown, green and even a greenish-blue at different times in her life.

It appears brown is her natural colour, however, after a peek at photos from when she was a teenager.

Ivanka Trump attends Momentum - A Taste For Life Gourmet Gala Benefit on October 19, 1995 at Toy Center in New York City. (Photo: Ron Galella/WireImage)

Ivanka Trump arrives for the "Glamour Women of the Year Awards" in New York City, November 9, 2015. (Photo: Carlo Allegri/Reuters)

Ivanka Trump is seated in the State Dining Room of the White House for a luncheon on International Women's Day on March 8 in Washington, DC. (Photo: Mandel Ngan/AFP/Getty Images)

Ivanka’s press representatives told Esquire in an email that they wouldn’t comment on whether she wears contacts.

But one optometrist is pretty sure she does.

"These definitely look like coloured contact lenses, her eyes are a darker, natural chestnut colour," Jacob Nachum told Inside Edition after looking at photos.

"They are not going to change this amount."

And Refinery29 noted that her eyes look different depending on the event.

At an informal roundtable discussion with female business leaders and Prime Minister Justin Trudeau in February, her eyes were brown.

Canadian Prime Minister Justin Trudeau speaks alongside Ivanka Trump during a roundtable discussion on women entrepreneurs and business leaders in the White House in Washington, DC, February 13. (Photo: Saul Loeb/AFP/Getty Images)

But during her Republican National Convention speech last summer, a more high-profile event, they looked green.

Ivanka Trump speaks on the last day of the Republican National Convention on July 21, 2016, in Cleveland, Ohio. (Photo: Jim Watson/AFP/Getty Images)

It also looks like she slipped in the green contacts for an interview with "CBS This Morning" earlier this month.

We may never know her strategy for changing up the colour, if there is one at all, but it's definitely an interesting fashion choice for an adviser to the President of the United States.

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