Inability to see something up close...myopic/myopia...EYE SEE what you did there...Depending on the time of day and lighting conditions etc, it can be easier to see the classic clock than the small digital at the top. This is especially true for someone who wears glasses but may not have the on the moment they are checking the time on the phone.
When you step outside your own myopic thought process, a lot of variables come into focus that make the obvious answer more gray and weathered down by circumstance.