Question:
Does anyone know whether something like this happens after cataract
surgery? Can we hope that this will be alright once she gets used to
the new lenses that she is wearing after the surgery and the sudden
improvement in her vision?
Answer:
If it occurs when she first gets up, it may be due to a sudden drop in blood
pressure. This can be helped by slowing getting up: sit up in bed for a
minute, then sit on edge of bed for a minute, then stand up. The other
common cause would be an inner ear problem. Cataract surgery is an unlikely
cause. If the dizzyness and balance problems continue, she should see her
medical doctor.
Maybe it's something like when one feels the solid ground move after having
been on a ship for a month.
Your mother had adjusted to seeing with only one eye and her brain has
(temporarily) lost the ability to adjust to the shifting of images that occurs
when one tilts one's head. (we don't notice it because our brains have
adjusted).
If this guess is correct the unsteadiness will disappear gradually.