From a section added to Social Security's HALLEX manual last week:
Before closing the hearing, the administrative law judge (ALJ) will remind the claimant that he or she must inform the ALJ about or submit, in its entirety, all evidence known to him or her that relates to whether he or she is blind or disabled. See 20 CFR 404.1512 and 416.912. If the claimant has a representative, then the ALJ will remind the representative that he or she must help the claimant obtain the information that the claimant must submit. See 20 CFR 404.1512, 404.1740, 416.912, and 416.1540. The ALJ must ask the claimant and the representative if they are aware of any additional evidence that relates to whether the claimant is blind or disabled.