I wonder if the photo was technically adjusted ? It has the "photoshop" appearance of one eye duplicated for the other. It is a technique often used to account for artifacts, poor exposure, divided lighting etc etc ..In this case her left eye being used to create her right eye. The overexposure leading from her right to a lighter right side of her nose, mouth, hair line and veil does not match with her right eye exposure. Usually the point of light reflected in the eye is positioned slightly different given the distance between the eye centers. This photo shows them to be perfect of each other. If indeed this a reproduced photo one of the known artistic outcomes when copying one eye for the other is a "stare effect." ... In kind regard ..
C'est Bon Magnifique ..