The term pupillary sphincter is identified in base64 scheme by the sequence cHVwaWxsYXJ5IHNwaGluY3Rlcg==, while the MD5 signature is equal to a748c3ed13862dd3eb35c9d4eeeb9a5b. The ASCII encoding of pupillary sphincter in hexadecimal notation is 707570696c6c61727920737068696e63746572.