I just took Enchroma's online test, don't know if I responded appropriately to every question, should probably have said nothing or unsure many times when I otherwise indicated an integer. Their diagnosis was Protan, which is different from what I figured I am. Protan is a red-green form of CB. They then indicated that I stand a 30% chance of benefiting from their glasses. That doesn't inspire confidence. They have a 60 day return policy, so I could try them and they are in my town. You see why I have my doubts here. I remember their prices looking steep to me, it was hundreds IIRC.
I figured I could at least bicycle down to their offices and try on their glasses, maybe determine then and there if there's a benefit without even pulling out my credit card. It's a trip down there, I don't expect not to be disappointed, however.
Hmm.
Protan doesn't sound right if you struggle more with green, that would be Deutan which involves the M-cone (medium wavelength, aka Green-sensitive cone).
Do you struggle more with the color of Red traffic signals, or green? Most "green" lights for me look nearly white. Based on my own research and some tests, I generally identify in the Deutan side. The M-cones are by far the most common to get screwed up, or end up missing entirely.
Deuteranopia would be the total lack of the green cone, whereas Deuteranomaly means the green cones are present but defective to some degree.
Note, it can definitely get weird because with the vast majority of types, there isn't a total lack of that color from your vision entirely, because the other cones may still pick up those wavelengths but with far less sensitivity. And then there's the brain processing it all, combining the raw data into visual color (which cells picked up what, and how strong).
Of course other colors get screwed up too, because nearly every color/shade we see contains some mix of multiple wavelengths. I frequently screw up dark reds and brown, brown and green, green and yellow, and blue/purple. I can see blue just fine, but the red in purples screw me up... and then there's the fact that my brain gets trained to identify some dark blues as purple (and other colors),
expecting it to have missing red. Half of our struggles with color identification is entirely due to our brain training itself.
I feel like I have a generally mild case, perhaps a bit more mild than my mom's (thanks mom, I had no chance at avoiding CVD). And with it generally being mild, I can't imagine I have any missing cones, just defective.
But it's always weird when light pinks appear light gray, some light greens are light-gray or white, and some cyans are both one of my favorite colors and also rather despised (is it blue? gray? is that green in there? hmmm)
edit:
Also, take online tests with a grain of salt, unless you have the opportunity to use a properly calibrated and quality monitor. Most generic monitors are not exactly color accurate - this is why eye doctors use a printed book, as the prints are fully calibrated.
You could probably take the same test on a few different monitors and get a different result.
edit2:
Just took enchroma's test (again), said I'm a mild protan.
I dunno, I'm just used to acknowledging my color vision is screwed up. And blue is beautiful!
(this test was done on my MBP, can't remember if I ever calibrated it but generally these have fairly accurate displays out of the box)