Really you need a mini scope. Try with the rifle scope. If you have a smart fone zoom in as much as you can an take some pictures. Then zoom in when you view the pictures. Check underneath an above the leaves. Those pests if there there are very tiny an hardly move. But there are some tell tale signs like the leaf edges rolling an little ditches, an also this almost glossy wet look to the leaves when the infestation is bad, an a lot of leaves falling off bottom upwards. Fingers crossed its something else.