@zz-emerz-zz first of all thank you for your answer.
I will explain rapidly what, for now give me problem (and which) in SOT:
The most important it's the PVP (for the animals, where i go with a cage i can see 'Gold Chicken' so it's not a problem). For pvp i have these problems: Where i fight the name for me it's the same for all, crews, allies, enemies. So during a fight or ship fight i need to read the name first and remember who is not in my crew/ally and then attack him. The second it's to see an enemy from a far distances: sometimes if someone is in the water or in a fort/isle from far it has less contrast for me and he becomes the some like the ambience (in less words i can't see the player because it has the same shader/color/contrast of the round ambience), also in water. So if usually all can see the player i n that case, i can't see him until he come near to me (it's the same for fps games, if the enemies are too far, if all peaople can see them, i can't). So i'm not asking for spotting enemies!
Treasures island map colors. My friend told me that in the treasures map, the rocks, and the trees have different colors (in particular trees) that are the same of the "real-in-game" so find treasures it was easly. So i can't see differences from the tress in the map (and also in the real-in-game), because i see them all the same shader/color and also i can't see, usally, the rocks in the map, for their less contrast. So where i go/went with treasures missions, i uses the isles border and what it were composed 8curves rocks) to identify the way to find the treasure
The new event: i started it yesterday with some mates of my crew. So i see that there are 5 colors that i take in different way. For which color i were taken in which death it's written in the commandations. The problems are: where i go in the island i don't know which color the island beacon is (and for 3 times i went with the same color, so i couldn't turn it and i had to go back on the ship; if i need to "steal/take" colors from other ships i don't know wich colors they have and if i need to take some color from my ship, or to put a color for the 5-colors-commandation i have to ask to someone of my crew which color i need to take.
I know that achromatopsia it's not known like colorblind. WIkipedia can explain it better then me, but in less words who have achromatopsia usually see in the grey scale/white and black, and so they can't see the color differences, for exemple i can see that a color is darkest then an other or lighter then the other, but normally, for exemple, some color for us are the same, like red/black and dark blue, or yellow and blue, or grey and green, etc (it's an exemple to explain bettere, it's so difficult to explain perfectly sorry :( ). And olso some times who have achromatopsia can have less degrees of view (in my case i have 1/10 degrees, so i can't see far things/phrases), and also sensitivity to light, for some of us a strong light gives boredom (in fact i uses dark glasses in my life and often to play).
- Light: In fact sometimes, for exemple in pvp, where i have the 'sun' forward me, i see all white and it's so difficult to see good the enemy and also skeleton, ships, etc....such us in the real, if you watch directly the sun for some seconds you see all 'white'. for me is the same, but also in game and in the real it's more annoying.
For now it's all problems that i have in mind in this moment and ...sorry for my english :)