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.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If corrective cylinder spectacle lenses
Eyewear prescription cylinder lenses classify under heading 9001.
If mechanical Maddox rod holders
Trial frame mounts without optical function classify generally.
If clock/watch optical glass components
Optical glassware for horology classifies under Chapter 70.
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Import Tips & Compliance
• Specify cylinder axis markings and streak length specifications
• Package in protective cases; declare as calibrated medical optics
• Distinguish from welding filter rods (safety equipment classification)
Related Products 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.