A whole bunch of useless info snipped for brevity.

Short version:

If you use a leading manufacturer of leaders and tippets, you need not
worry about anything. A little heat from your fingers to straighten
the leader so that you can use it. Shadows in lighted glasses? Duh!
How's come all of us are so successful catching fish on dry flies?
Took some big brookies and landlocks just a couple of days ago on
gasp leaders with gasp shadows. I've had shadows for 70 years
now. Doesn't seem to hurt my fishing. Of course if you put a fish in
a glass, shine a light on him and THEN try to catch him, well, the
shadows are gonna scare the poor creature.

OP: Continue to use Orvis leaders and tippet. Straighten the leadear
with heat from your hands. Too hot? If it's too hot for your hands,
it's too hot for the leader. Don't use a leader straightener because
you can not feel the heat. Carry ONE spare leader in your vest.
Problem solved.

Dave
PS: Listen to what Fortenberry, Richard, and George have said. They
fish regularly and do not need to google for answers. AND, they catch
fish, as I do, REGULARLY! d;o)