Noctem
Explorer
I was talking about natural darkness and not spells or magic in general. Those have rules of their own which are usually detailed in the spell entry itself. However, you have it reversed. Someone standing in darkness, magical or not, can see out of it fine unless the darkness/spell/magic in question has some special rule about it, which does in fact happen. That's precisely what the errata fixed. However, someone looking into the darkness, can't see what's inside of it, they are considered blinded for the purposes of seeing into the darkness unless they have a special sense like Yunru pointed out. Just like in real life basically. Here's a visual example to help:

As you can see, there are patches of darkness and light going down the hallway. According to the rules pre-errata, you wouldn't be able to see the hallway beyond the first patch of darkness because you're considered blinded. However, post errata, you would be able to see the rest of the hallway. That said, if you were trying to see something inside a patch of darkness, you're now considered blinded. When someone inside darkness tries to see out, they used to be considered blinded. Post errata they are not, unless they try to see something in the darkness. This was an important change to make. Hope this makes it more clear (har har)

As you can see, there are patches of darkness and light going down the hallway. According to the rules pre-errata, you wouldn't be able to see the hallway beyond the first patch of darkness because you're considered blinded. However, post errata, you would be able to see the rest of the hallway. That said, if you were trying to see something inside a patch of darkness, you're now considered blinded. When someone inside darkness tries to see out, they used to be considered blinded. Post errata they are not, unless they try to see something in the darkness. This was an important change to make. Hope this makes it more clear (har har)