Blindness & True Seeing

[Lamoni]

If your blind either your eyes don't work or your brain is not processing the information. Therefore any spells that enhance your sight...True seeing, darkvision, see invisibility, arcane sight, etc would not work.

That also depends on how you define "not working" You can stare at the sun until you go blind... yet you could say your eyes still worked, they were only damaged. If you go blind this way, you can still make out differences in light and dark. You just can't make out any shapes near or far. You could also spray something in someone's eyes to blind them temporarily. In this case the eyes still function, but are so irritated that they can't make out any shapes. I am sure you could come up with other forms of blindness too where the eyes 'worked', but were damaged. Therefore any enhancement to seeing should work fine.

If you don't like that argument, then if you have a near-sighted character that can only see up to 10', they will still only be able to see to 10' with True Seeing cast on them. But, True Seeing grants special vision up to 120'. So not only does it grant the special power of seeing through magical disguises and invisibility, it also corrects your vision to see up to 120'.

 

[Stalker0]

The spell let's you see things as they actually are. Who said normal vision was how things actually are?

I mean between lowlight, normal, darkvision, you got three kinds of sight. Then there's blindsight, blindsense, tremorsense, which one is "as they really are"

True seeing doesn't grant one sight in my opinion, it just enhances it.

 

[Lamoni]

The spell let's you see things as they actually are. Who said normal vision was how things actually are?

I mean between lowlight, normal, darkvision, you got three kinds of sight. Then there's blindsight, blindsense, tremorsense, which one is "as they really are"

True seeing doesn't grant one sight in my opinion, it just enhances it.

You confer on the subject the ability to see all things as they actually are. The subject sees through normal and magical darkness, notices secret doors hidden by magic, sees the exact locations of creatures or objects under blur or displacement effects, sees invisible creatures or objects normally, sees through illusions, and sees the true form of polymorphed, changed, or transmuted things. Further, the subject can focus its vision to see into the Ethereal Plane (but not into extradimensional spaces). The range of true seeing conferred is 120 feet.

You could argue that lowlight, normal, and darkvision are all different kinds of sight. But then I would argue that the sight that True Seeing gives you can be considered a 4th kind of sight.

You brought up blindsight, blindsense, and tremorsense. If a spell gave me any one of those, I don't think you would be arguing that it only enhances my innate blindsight and if I didn't already have blindsight, then the spell wouldn't work for me. I don't have bat ears or the capability to send out supersonic signals and interpret them. I don't have antennae to help me either, but if a spell granted me any of those, I would argue that I would have every part of the ability, not just an enhanced form of what I already possesed.

I understand your opinion... but it isn't clear in the rules one way or the other. Therefore it is up to the DM. I am just saying that if I was DM, I would rule that the spell true seeing would grant that 4th type of sight as described in the spell description for the duration of the spell, but would not cure the blindness condition.