Section 886.1420 - Ophthalmic lens gauge(a)Identification. An ophthalmic lens gauge is a calibrated device intended to manually measure the curvature of a spectacle lens.(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 .52 FR 33355, Sept. 2, 1987, as amended at 53 FR 35604, Sept. 14, 1988; 66 FR 38811 , July 25, 2001