Amazon has some good choices, i recommend the bauch&lomb brand, hastings triplet for clear view.

I got this one

https://www.amazon.com/Bausch-Lomb-Hastings-Triplet-Magnifier/dp/B0007LRNG6/ref=mp_s_a_1_5?dchild=1&keywords=hastings+triplet+loupe&qid=1596402664&sr=8-5

It works great, its just a tad bit small. Works fine for me tho, good price for great quality.

For a quicker way to spot errors, recommend

https://www.amazon.com/Plugable-Microscope-Flexible-Observation-Magnification/dp/B00XNYXQHE/ref=mp_s_a_1_1_sspa?dchild=1&keywords=plugable+usb+microscope&qid=1596402760&sprefix=plugable+usb+mi&sr=8-1-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEzTUVNRDNUVzAwN0Y5JmVuY3J5cHRlZElkPUEwNzI2MTM2M0dURUZNVlNKQ0RVSCZlbmNyeXB0ZWRBZElkPUEwNjczMjU2MTZMWkVMTTE4QVNVQiZ3aWRnZXROYW1lPXNwX3Bob25lX3NlYXJjaF9hdGYmYWN0aW9uPWNsaWNrUmVkaXJlY3QmZG9Ob3RMb2dDbGljaz10cnVl

Extremely good working desktop usb microscoper, gets the work done, good bang for your buck.