One person, every era
The same face, skin, iris and framing in all ten eras. Eras may change the screen, the light, the lens, the medium, the gaze and the sign. They may never change the person.
The rule
There is one person. They are 25, South Indian, with a dark brown iris. Every era shows that person.
Why
The first plan gave each era its own face: someone around fifty for 1970, someone else for 2003. Ten well-made eyes in a row read as a gallery of strangers. One eye in ten kinds of light reads as a life spent in front of screens, which is the story the site is telling.
What it costs
Every realism change has to be checked ten times, each in its own terms. A new skin detail that is right in 2009's warm photo can vanish in 1981's two colours or turn to noise in 1970's phosphor.
"Most realistic in 1995" therefore never means a change to the person. It means the same person under 1995's conditions: its light, the pupil that light causes, its lens, its medium.