I concur with these two wise fellers. As Victor mentioned, laziness is a problem. My welds are adequate, but usually a bit on the ugly side of the spectrum. They get uglier when I get lazy. Sometimes, I'm just lazy in re-positioning to continue to see the puddle well, but other times, I can't see the line between the parts I'm welding, and my bead strays off it, making it ugly and inadequate. Bringing in some work lights will solve that problem, but, man, is it difficult for me to get that through my thick noggin'! Patience and welding go hand-in-hand.
Age-related presbyopia has been difficult for me to deal with for the past 15 years, and the need to really see the puddle has had me spending lots of money on fancy prescription glasses with progressive lenses, as well as on high-quality welding helmets, which, especially for these old eyes, have been worth every penny. I've found the Lincoln helmets to be ideal for me. I have these two:
For most welding: https://www.lincolnelectric.com/en/Products/k3034-5
For welding in confined spaces, like under the LJ: https://www.lincolnelectric.com/en/Products/k4643-1
Don't discount the need for comfortable headgear in the helmet. A helmet that fits your head poorly will distract you from welding well. Both of those Lincoln options are very comfortable to wear for hours. The retail prices are scary, and street prices are substantially lower, but still on the high side. Just like welders, you get what you pay for. If you can afford the Lincoln stuff, it's worth it. If you can't, then you can't.
This is triple the price I paid for my welder