Other
Instruments and appliances used in medical, surgical, dental or veterinary sciences, including scintigraphic apparatus, other electro-medical apparatus and sight-testing instruments; parts and accessories thereof: > Other instruments and appliances and parts and accessories thereof: > Optical instruments and appliances and parts and accessories thereof: > Other
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.05, 9903.88.06, 9903.88.07, 9903.88.08, 9903.88.10, 9903.88.11, 9903.88.14, 9903.88.19, 9903.88.50, 9903.88.52, 9903.88.58, 9903.88.60, 9903.88.62, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(b) [to this subchapter]
Products classified under HTS 9018.90.20.00
Phoropter Lens Set
A set of trial lenses used in phoropters for refractive error testing during eye examinations. This optical instrument and its accessories fall under HTS 9018.90.20.00 as other optical appliances for sight-testing in medical sciences. It enables precise vision correction measurements.
Slit Lamp Biomicroscope
High-magnification optical instrument using a narrow beam of light for detailed anterior segment eye examination. Classified in HTS 9018.90.20.00 as other optical appliances for medical sight-testing. Essential for diagnosing corneal and lens abnormalities.
Ophthalmic Trial Lens Kit
Portable set of spherical, cylindrical, and prism trial lenses for refraction testing in optometry. Falls under HTS 9018.90.20.00 as optical accessories for sight-testing instruments. Used to determine eyeglass prescriptions accurately.
Retinoscope Optical Accessory
Streak retinoscope with cobalt blue filter and fixation target for objective refraction. HTS 9018.90.20.00 covers this as other optical sight-testing appliance. Detects refractive errors without patient response.
Keratometer Measurement Head
Precision optical attachment measuring corneal curvature for contact lens fitting. Classifies under HTS 9018.90.20.00 as optical appliance part for sight-testing. Provides dioptric measurements of corneal astigmatism.
Gonioscope Lens
Contact lens with mirrored surfaces for viewing anterior chamber angle via slit lamp. HTS 9018.90.20.00 applies to this specialized optical diagnostic accessory. Essential for glaucoma angle assessment.
Fundus Camera Lens Adapter
Optical interface converting standard cameras for retinal fundus photography. Falls under HTS 9018.90.20.00 as sight-testing optical accessory. Enables high-resolution retinal vessel documentation.
Visual Field Perimeter Chin Rest
Optical alignment accessory positioning patient for automated perimetry testing. HTS 9018.90.20.00 covers optical positioning components of sight-testing instruments. Ensures reproducible test conditions.
Corneal Topographer Objective Lens
Placido disc illumination optics for corneal surface mapping. Classifies under HTS 9018.90.20.00 as optical component of sight-testing videokeratography. Generates elevation maps for ectasia detection.
Pupilometer Optical Sensor
Infrared optical sensor measuring pupillary distance for eyewear fitting. HTS 9018.90.20.00 includes optical pupillometers as sight-testing appliances. Digital readout for precise lens centering.
Color Vision Test Lantern
Edridge-Green lantern simulating railway signaling for color blindness diagnosis. Optical instrument under HTS 9018.90.20.00 for medical sight-testing. Tests aviation and transportation worker qualification.
Amsler Grid Projector Lens
Projection optics displaying distortion grids for macular function screening. HTS 9018.90.20.00 covers optical projectors for sight-testing. Detects metamorphopsia in retinal disease.
Worth Four Dot Optical Test Kit
Polarized optical dissociator with four colored dots for binocular vision assessment. Sight-testing optical appliance under HTS 9018.90.20.00. Diagnoses suppression and fusion anomalies.
Maddox Rod Lens Set
Cylindrical lens array creating streaked images for phoria measurement. Optical accessory for sight-testing under HTS 9018.90.20.00. Quantifies horizontal/vertical eye deviations.
Duochrome Test Slide Projector Optics
Red-green bichromatic optics balancing spherical refractive errors. HTS 9018.90.20.00 includes optical test projectors for sight-testing. Endpoint determination in subjective refraction.