CFR > Title 21 - Food and Drugs > CHAPTER I—FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES > SUBCHAPTER H—MEDICAL DEVICES (parts 800 to 898) > PART 886—OPHTHALMIC DEVICES > SUBPART F—Therapeutic Devices (§886.5100 to §886.5933) > 886.5100—Ophthalmic beta radiation source.