If she’s that old and likes to forage there’s only so many bad mushrooms you can eat

Also, women tend to have better natural color distinction, they more prominently have a genetic mutation that adds a 4th color cone.

Additionally men are significantly more likely to have some form of colorblindness.

Age also can have an effect on your perception of the world as well as the objective quality of your vision.

Finally, describing the subject of the sentence is normal.