It is important to understand the difference between the IIN and NCPDP Processor ID Number (BIN) before applying for a Processor ID Number (BIN).
Sclero-: (Or scler-) A confusing prefix that can refer exclusively to hardness (from the Greek skleros meaning hard) but that can also refer to the sclera of the eye.
The sclera, also known as the white of the eye, is the opaque (usually white, though certain animals, such as horses and lizards, can have black.