Wavelength may be objective, but the signal that a brain receives may be different if the cells which are supposed to receive that objective wavelength aren’t functioning correctly.
Like if I make you wear rose coloured glasses, it doesn’t matter what colours I show you, you won’t be able to name them correctly because the objective stimulus is literally coloured before it makes it to your brain.
Except the rose-colored glasses example doesn’t really disagree, because the colored glass is absorbing all the photons except the pink ones, so you’re really just further making my point.
Wavelength may be objective, but the signal that a brain receives may be different if the cells which are supposed to receive that objective wavelength aren’t functioning correctly.
Like if I make you wear rose coloured glasses, it doesn’t matter what colours I show you, you won’t be able to name them correctly because the objective stimulus is literally coloured before it makes it to your brain.
Except the rose-colored glasses example doesn’t really disagree, because the colored glass is absorbing all the photons except the pink ones, so you’re really just further making my point.