Pupillometers in Canada vs the US: Which Device Class Applies?

Quick facts

• A pupillometer measures, by reflected light, the width or diameter of the pupil of the eye.
• United States: 21 CFR 886.1700 places the device in Class I with general controls, and exempts both the AC-powered device and the manual device from premarket notification subject to the limitations in 21 CFR 886.9.
• The manual device carries a further exemption from the current good manufacturing practice requirements of the quality system regulation, with the exception of the records provision and the complaint files provision.
• Canada: there is no named entry, and Rule 10(1) of Schedule 1 to the Medical Devices Regulations, SOR/98-282 produces Class II, because a pupillometer is an active diagnostic device used to monitor a physiological process.
• The result is a one-class gap on the same bench instrument: Class I in the United States, Class II in Canada.
• Canadian regulation text used here is current to 2026-09-21 and last amended 2026-06-17, as stated on the official consolidation.

A pupillometer measures something small and transient — the diameter of the pupil under light — and it sits in an examination lane next to instruments that measure the eye in other ways. The two countries disagree about how much oversight the measurement needs, and the disagreement is one class wide. That single class carries different consequences in each country, and it is the clearest recent example of how far apart a rule-based system and a catalogue-based system can drift on an unremarkable instrument. This article sets out both routes, the neighbouring ophthalmic entries, and the record a clinic should hold.

What is a pupillometer, in the words of each code?

The American identification paragraph is one sentence long, and both its limits are worth noting. Section 886.1700(a) describes a pupillometer as an AC-powered or manual device intended to measure by reflected light the width or diameter of the pupil of the eye.

The device is defined by the quantity it measures and by the method — reflected light — and it is confined to the pupil. It is not the instrument that adjusts a prescription and it is not the instrument that images the retina.

Canada writes no paragraph for the instrument. The class comes from the definitions and from Rule 10:

• Active device — a device that depends for its operation on a source of energy other than energy generated by the human body or gravity.
• Active diagnostic device — an active device used for the purpose of diagnosis or monitoring.
• Rule 10(1) — an active diagnostic device that supplies energy for the purpose of imaging or monitoring physiological processes is classified as Class II.

A pupillometer supplies light and reads the reflected response, which is a physiological process being monitored. Rule 10(1) therefore applies, and the class is Class II.

How does the pupillometer class differ between Canada and the United States?

The divergence here is a whole class, not a sub-route.

Item	Canada	United States
Named entry	None in Schedule 1	21 CFR 886.1700
Class	Class II	Class I with general controls
Basis for the class	Active diagnostic device that supplies energy for imaging or monitoring	Reflected-light measurement of the pupil, named in the section
Premarket notification	No named entry to exempt	AC-powered and manual forms exempt subject to 886.9
Manufacturing carve-out	None written for the instrument	Manual form exempt from part 820 except records and complaints
Practical effect for the clinic	Class follows the rule	Class follows the schedule entry

The American section does two things at once. It sets a low class, and it then exempts both forms from premarket notification. The manual form also escapes part of the quality system regulation: the section states that the manual device is exempt from the current good manufacturing practice requirements, with the exception of the records provision and the complaint files provision.

Canada reaches a higher class with a rule that never names the instrument. Because Rule 10(1) is written around what the device does with energy rather than around what it is called, a device that supplies light to monitor a physiological process lands in Class II whether or not the schedule mentions it.

Which ophthalmic instruments sit near the pupillometer in each code?

Several instruments in the lane measure the eye optically, and the two codes place them in different classes.

Device	Canada	United States
Pupillometer	Rule 10(1), Class II	886.1700, Class I
Ophthalmoscope	Rule 10(1), Class II	886.1570, Class II
Retinoscope	Rule 10(1), Class II	886.1780, Class I or Class II by power source
Ophthalmic refractometer	Rule 12, Class I	886.1760, Class I
Visual acuity chart	Rule 7(1), Class I	886.1150, Class I
Slit-lamp biomicroscope	Rule 10(1), Class II	886.1850, Class II

The pattern is consistent across the family. A powered device that supplies energy to the eye for imaging or monitoring is Class II in Canada, while the American code assigns each generic type its own class and its own exemption position.

A second pattern is that the American code can grant a premarket exemption to a device that carries a higher class than a Canadian device carrying a lower one. The classes are not a ranking of the two systems. They are the output of two different questions.

Do Canada and the United States apply the same reasoning to a manual instrument?

They do not, and the manual pupillometer is the case in point.

In the United States the manual form is treated as a variant of the same generic type, sharing the section and the class, and receiving its own manufacturing carve-out in the same paragraph.

In Canada the manual form is not obviously an active device at all. An instrument that depends on the examiner's eye and no energy source other than the human body may fall outside the active device definition, and a device that is not active cannot be reached by Rule 10(1). Where that happens, the class is derived from the non-invasive rules instead, and the answer is different from the class of the powered instrument bearing the same name.

The practical point for a buyer is that the name on the box does not determine the class in Canada. The intended use and the presence of an energy source do.

A buyer who wants to check a specific model can look it up in the openFDA device classification API or the FDA classification database. On the Canadian side, the class follows from the rule rather than from a lookup, which is why the rule text itself is the reference to keep.

What should a clinic keep on file for a pupillometer?

Six items, most of them supplied by the maker or set by the clinic's own protocol.

• The model and whether it is powered or manual. The two forms can be classified differently, so the record should be unambiguous.
• The maker's intended use statement. Classification follows intended use in both countries.
• The licence or clearance position. In Canada, the class and licence status; in the United States, whether the form is within the exemption.
• The instruction for use. Cleaning and disinfection instructions for the body and any surface that contacts the patient.
• The pupil record convention. Where pupil size is documented, the unit and the scale in use belong with the clinic's protocol.
• The patient-contact barrier record. Where a disposable barrier or a soft accessory is used, its record links the instrument to the day's list.

Which consumables does an eye clinic restock alongside its measurement instruments?

An examination lane restocks barriers, paper, gauze and cleaning supplies on the same cycle as its instruments. For practices buying at case level, the wholesale ordering page sets out account and case terms, and the B2B wholesale collection lists the lines held for institutional buyers. The exam table paper roll covers the couch in the testing lane, the Snellen and Amsler chart set covers the acuity and field cards used alongside the measurement, and practices that want to see the monitoring and consumable lines together can start with the sterilization monitoring collection or the biological indicator 5-pack trial.

Sources

1. 21 CFR 886.1700, pupillometer
2. 21 CFR 886.9, limitations of exemptions
3. 21 CFR 886.1570, ophthalmoscope
4. 21 CFR 886.1780, retinoscope
5. 21 CFR 886.1760, ophthalmic refractometer
6. 21 CFR 886.1850, slit-lamp biomicroscope
7. 21 CFR 886.1150, visual acuity chart
8. 21 CFR 820.180, general requirements concerning records
9. 21 CFR 820.198, complaint files
10. Medical Devices Regulations, SOR/98-282, full text and Schedule 1
11. Health Canada, medical devices
12. openFDA device classification API
13. FDA device classification database
14. ISO 15004-1:2020, ophthalmic instruments, fundamental requirements
15. College of Optometrists of Ontario, standards of practice
16. Canadian Association of Optometrists, eye health library
17. World Health Organization, blindness and visual impairment
18. Canadian Centre for Occupational Health and Safety, OSH answers
19. US OSHA bloodborne pathogens standard, 1910.1030
20. CLSI standards

Related reading

• Eye Wash Solution in Canada vs the US: Which Flushing Fluid Rules Apply
• Eye Shields in Canada vs the US: Which Device Rules Apply
• Comprehensive Eye Check-Ups in Canada vs the US: Which Exam Interval

CliniEco Medical supplies eye care, laboratory and clinic consumables of the kind described in this article. MDEL #35334. This article is written for clinic, procurement and infection-control professionals and is not clinical guidance; instrument selection and examination technique belong to the treating professional and the provincial requirements that apply to the practice.

Frequently Asked Questions

What class is a pupillometer in the United States?

Class I with general controls under 21 CFR 886.1700. Both the AC-powered device and the manual device are exempt from premarket notification subject to the limitations in 21 CFR 886.9.

What class is a pupillometer in Canada?

Class II, derived from Rule 10(1) of Schedule 1 to the Medical Devices Regulations. The rule classifies an active diagnostic device that supplies energy for the purpose of imaging or monitoring physiological processes as Class II, and a pupillometer supplies light and reads the reflected pupil response.

Does the United States exempt the manual pupillometer from manufacturing requirements?

It exempts the manual device from the current good manufacturing practice requirements of the quality system regulation in part 820, with the exception of the records provision and the complaint files provision. Those two provisions continue to apply.

Why can the same instrument be one class apart between the two countries?

Because the two systems ask different questions. The United States names the generic type and sets the class in a section that also carries an exemption. Canada classifies by a functional rule that turns on whether the device is active and what it does with energy, and that rule produces Class II.

Does the power source change the class in Canada?

Not for this instrument. Rule 10(1) does not turn on the power source, so a powered pupillometer is Class II. A purely manual instrument, by contrast, may fall outside the active device definition altogether, and its class is then derived from the non-invasive rules.

Which Canadian document states the classification rules?

Schedule 1 to the Medical Devices Regulations, SOR/98-282. Part 1 covers medical devices generally, with the active device rules in rules 8 to 12, and Part 2 covers in vitro diagnostic devices. The consolidation used here states that the text is current to 2026-09-21.