Final answer:
To improve the resolving power of the compound eye, one can increase the numerical aperture (NA) of the eye's lenses.
Step-by-step explanation:
The resolving power of the compound eye can be improved by increasing the numerical aperture (NA) of the eye's lenses.
The larger the NA, the larger the cone of light that can be brought into the lens, which allows more diffraction modes to be collected. As a result, the eye has more information to form a clear image and its resolving power is higher.