[Code of Federal Regulations] [Title 21, Volume 8] [Revised as of April 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 21CFR886.1435] [Page 456] TITLE 21--FOOD AND DRUGS CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) PART 886--OPHTHALMIC DEVICES--Table of Contents Subpart B--Diagnostic Devices Sec. 886.1435 Maxwell spot. (a) Identification. A Maxwell spot is an AC-powered device that is a light source with a red and blue filter intended to test macular function. (b) Classification. Class I (general controls). The device is exempt from the premarket notification procedures in subpart E of part 807 of this chapter, subject to the limitations in Sec. 886.9. [55 FR 48442, Nov. 20, 1990, as amended at 59 FR 63013, Dec. 7, 1994; 66 FR 38811, July 25, 2001]