from what ive seen so far, with something like spider or pinstripe you have good chances of seeing it under UV light.

unfortunately there are close to no pictures of different blue-eye-lucys under UV light online, so you will have trouble finding any reference point if you see anything new or unusual under UV light. The UV method can only really work and be reliable if there would be a collection of reference images from different people somewhere.

eye color can also be an indicator, works perfectly for example for albinos.