I am not a doctor ... but ... As I understand it, we all have some floaters - some more than others. They typically get worse as we get older.
From an astronomy point of view the higher the magnification and smaller the exit pupil they more they are noticeable. For me looking at wide fields, I don't see them at all - once I start to push the limits and get down under the magical 2mm optical exit pupil I see mine a lot - 1mm to 0.5mm it's hard not to see them. I am lucky not to see them during the day and other tasks, my dad isn't so lucky - so I suspect that's my path too long term.
For your wife try an eyepiece combination with a larger exit pupil. Less magnification and / or larger field of view.
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