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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If mechanical chin rest or patient positioning
Non-optical support parts classify under general medical instrument parts.
If industrial surface contour measurement
Optical measuring instruments not for medical sciences classify under 9031.
If machine tool optical positioning aids
Optical devices for manufacturing equipment fall under Chapter 84.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Calibrate against NIST-traceable standards before import declaration
• Declare as medical device part with principal use documentation
• Avoid describing as 'industrial optical gauge' to prevent Chapter 90 shift
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.
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.