You know @Karl 
I believe that it is possible to see both old woman young woman at the same timeā¦ The word āseeā is problematicā¦ I believe that what we see is conditioned to such an extent that it actually covers/hides reality. I donāt know how to describe it - sorry.
For your amusement I attach a link to the video of the basketball challenge. This is a decades old psychology experiment - all about discernment 
Enjoy! though your vision issues may complicate or negate the usual resultā¦
https://discourse.suttacentral.net/t/tilakkhana-the-3-marks-of-what-exactly/8466/51