[Code of Federal Regulations] [Title 21, Volume 8] [Revised as of April 1, 2001] From the U.S. Government Printing Office via GPO Access [CITE: 21CFR886.1090] [Page 434] 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. 886.1090 Haidlinger brush. (a) Identification. A Haidlinger brush is an AC-powered device that provides two conical brushlike images with apexes touching which are viewed by the patient through a Nicol prism and intended to evaluate visual function. It may include a component for measuring macular integrity. (b) Classification. Class I. The device is exempt from the premarket notification procedures in subpart E of part 807 of this chapter. [55 FR 48441, Nov. 20, 1990, as amended at 59 FR 63012, Dec. 7, 1994]