Hi Pete
When crimping at the machine, I always have a nice bright cree headlamp (from Jaycar).
Also I buy pairs of 3.5 or 4+ reading glasses from the $2 shop for magnification.
Very useful, unless of course you already have  4- eyes.

Also if you're going to do a lot of crimping, I highly recommend a ratcheting crimper.

https://www.greatplainselectronics.com/products.asp?cat=138

Pretty expensive at over $US100.00, but perfect crimps every time and in one motion for both inner/outer crimp.