{"data":{"id":"us/21-cfr-886.1435","jurisdiction":"us","citation":"21 CFR 886.1435","heading":"Maxwell spot.","body":"(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.\n(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 § 886.9.","path":["Title 21—Food and Drugs","CHAPTER I—FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES","SUBCHAPTER H—MEDICAL DEVICES","PART 886—OPHTHALMIC DEVICES","Subpart B—Diagnostic Devices"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-21.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:24:47Z","sha256":"3eb2dc94214d6b33f924164768b8bed49ee85da9c9f654723433d6beb04e68e1","source_id":"us-cfr","stale":true,"prev":"us/21-cfr-886.1430","next":"us/21-cfr-886.1450"},"notice":"GroundRules: Original legal text. Not legal advice."}