I'm going to go out on a limb somewhat here, but if you are referring to the use of a human eye as a password then you are talking about a biometric device known as a retinal scanner. They do exist as lock devices primarily, but could be used for just about anything that requires authentication that is difficult to fake.
what is the password for red-eyes b. dragon?
53347303
showdown
Red-Eyes Darkness Dragon's password is: 9-6-5-6-1-0-1-1(FYI, you can find any card's password by looking at the bottom left corner of the card.)
No it is not possible
"SUPREME" is the code for Blue-Eyes Ultimate Dragon.
23995346
Its very possible. Either the grandparents or great grandparents had blue eyes. Someone in the family must have blue eyes.
yes it is!
The code for the "Blue-Eyes White Dragon" card is 80906030.
no it is not possible for any human to have 3 eyes.
No.