Ophthalmic Refractometers in Canada vs the US: Which Class Applies?

October 4, 2026

$CliniEco eye care device on a bench beside a refraction instrument at an eye clinic$

Quick facts

United States: an ophthalmic refractometer has a named entry at 21 CFR 886.1760, described as "an automatic AC-powered device" with a fixation system, a measurement and recording system and an alignment system, intended to measure refractive power by measuring light reflexes from the retina.
United States: the section places the instrument in Class I (general controls), exempt from premarket notification subject to the limitations in 886.9.
Canada: Schedule 1 to the Medical Devices Regulations, SOR/98-282 names no refractometer. The instrument depends on a source of energy other than the body, so it is an active device.
Canada: it supplies light energy to measure the eye, which brings it within Rule 10(1): an active diagnostic device that supplies energy for the purpose of imaging or monitoring physiological processes is classified as Class II.
The class gap is real. The same instrument is Class I in the United States and Class II in Canada, and the gap comes from where each framework looks: the American section looks at how the instrument is named and used, the Canadian rule looks at the energy it puts into the eye.
Canadian regulation text used here is current to 2026-09-21 and last amended 2026-06-17, as stated on the official consolidation; the American section was last amended 66 FR 38812, July 25, 2001.

An automatic refractometer is the instrument a patient sits behind while a chin rest is adjusted and a light is projected into the eye. It reads a refraction in seconds and prints a slip. In the United States the instrument has its own section and is Class I. In Canada the same instrument is caught by a rule about active diagnostic devices, and the class that comes out is higher than the American one. That is worth knowing before an equipment list is compared across the border.

Does an ophthalmic refractometer carry the same class in Canada and the United States?

No. The American class is Class I and the Canadian reading is Class II.

The American section is two paragraphs. Section 886.1760(a) identifies the article as "an automatic AC-powered device" consisting of a fixation system, a measurement and recording system and an alignment system, intended to measure refractive power by measuring light reflexes from the retina. Section 886.1760(b) places it in Class I and exempts it from premarket notification subject to 886.9.

Canada does not name the instrument, and that absence does not leave it unregulated. Schedule 1 begins with the device's relationship to energy. A refractometer depends for its operation on a source of energy other than energy generated by the body or gravity, so it is an active device. It is also an active diagnostic device, because it supplies information for detecting, monitoring or treating a physiological condition. Rule 10(1) then applies: "an active diagnostic device, including any dedicated software, that supplies energy for the purpose of imaging or monitoring physiological processes is classified as Class II."

The instrument projects light and reads the reflection from the retina. On that reading, the article is measuring a physiological process by supplying energy, and Rule 10(1) places it in Class II. Rule 12, the catch-all for any other active device, would give Class I — and section 7 of the Regulations is explicit about what happens when a device can be placed in more than one class: "If a medical device can be classified into more than one class, the class representing the higher risk applies." Either way the class is Class II in Canada.

Item	Canada	United States
Named entry for an ophthalmic refractometer	None in Schedule 1	886.1760, ophthalmic refractometer
Route to a class	Rule 10(1), active diagnostic device, Class II	886.1760, Class I, general controls
Trigger	The device is active and supplies energy for imaging or monitoring	The article matches the identification paragraph
Premarket notification	Not applicable at Class II on these facts	Exempt, subject to the limitations in 886.9
An automatic AC-powered unit	Class II	Class I
Rule applied where two rules could read	Section 7, the higher-risk class applies	The named section governs

How does the active device rule in Canada differ from the named entry in the United States for a bench instrument?

It asks three questions in order, and a refractometer answers the second one.

First, is the device active? A device is active if it depends for its operation on a source of energy other than energy generated by the human body or gravity. A refractometer needs mains power, so it is active.

Second, is it an active diagnostic device? The definition covers an active device intended to supply information for the purpose of detecting, monitoring or treating a physiological condition, state of health, illness or congenital deformity. A refractometer supplies refractive power information, so it is an active diagnostic device.

Third, does it supply energy for imaging or monitoring? Rule 10(1) says an active diagnostic device that supplies energy for the purpose of imaging or monitoring physiological processes is Class II. Only where the instrument is used to monitor or diagnose disease — and erroneous readings could result in immediate danger — does Rule 10(2) carry it to Class III. Refraction is not that, so the class settles at Class II.

That sequence is why the Canadian class does not depend on any claim the maker makes on the page. The American class does. A bench instrument promoted with no medical claim sits outside the American identification paragraph entirely; in Canada the physics decides the class first.

Stage of the analysis	Question asked	Reading for an automatic refractometer
Energy source	Does it depend on energy other than the body?	Yes, mains power
Device type	Does it supply information about a physiological condition?	Yes, refractive power
Rule 10(1)	Does it supply energy for imaging or monitoring?	Yes, light projected into the eye
Rule 10(2)	Could an erroneous reading cause immediate danger?	No
Resulting class	Higher-risk rule where two could read	Class II

$CliniEco eye care device on a bench beside a refraction instrument at an eye clinic$ $CliniEco sterile gauze sponges prepared for the wipe-down step after a refraction visit$

What does a Canadian clinic hold for a Class II refractometer?

Six items, and the last two are the ones that separate a licence file from a purchase file.

The device record. The instrument register entry with a unique identifier, mapped to the physical unit on the bench.
The intended use. The testing step the instrument supports, in the clinic's own words rather than the catalogue description.
The manufacturer's instructions. The cleaning and handling instructions, filed with the instrument rather than with the purchase order.
The electrical safety documentation. The declaration that covers the appliance, filed with the instrument.
The verification record. The last check of the reading against a reference, with the tolerance the clinic applies to the step it is used for.
The class position. A short note recording why the clinic treats the instrument as Class II, with the rule it relied on, so the file does not have to be rebuilt the next time an inspector or an insurer asks.

Which consumables does a refraction room restock alongside its instruments?

Instruments and the consumables that run with them are ordered on the same cycle. For clinics 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 sterile gauze sponges cover the wipe-down step between patients, the multi-temperature eye care device covers the lid-warming step that follows some visits, and clinics that also reprocess instruments can pair the monitoring collection with the biological indicator 5-pack trial.

Sources

An equipment file is only as good as the sheet behind it. The printable cycle log for one bench is a free form sized for a single-bench clinic, with a column for the instrument identifier beside each cycle. The generator that sizes the sheet to the cycles you run builds that sheet from the number of benches and the cycles they run, which keeps a small clinic from printing pages it never fills. No account and no sign-up are needed to open either one.

Where an instrument sits between two rules, the useful answer is the one written for your own bench. Ask a compliance specialist and a written answer comes back specific to your equipment and province, with the regulation or standard it is based on cited.

Related reading

CliniEco Medical supplies laboratory, eye care and clinic consumables of the kind described in this article. MDEL #35334. This article is written for optometry, clinic and procurement professionals and is not safety or regulatory guidance; the acceptance of an instrument, its verification programme and its documentation belong to the practice's quality system and to the requirements that apply to it.

Frequently Asked Questions

Is an ophthalmic refractometer a Class I or Class II device in Canada?

Class II. It is an active diagnostic device that supplies light energy for the purpose of monitoring a physiological process, which brings it within Rule 10(1) of Schedule 1 to the Medical Devices Regulations.

Why is the same instrument Class I in the United States?

Because the United States classifies it by a named entry. Section 886.1760 identifies the ophthalmic refractometer and places it in Class I, exempt from premarket notification subject to the limitations in 886.9.

What happens if two Canadian rules could classify the instrument differently?

Section 7 of the Medical Devices Regulations answers this. If a medical device can be classified into more than one class, the class representing the higher risk applies.

Does the class depend on what the maker claims?

In Canada it does not. The class follows the device, the energy it depends on and the purpose it supplies information for. In the United States a general purpose powered instrument is reached by the named section only where the article matches the identification paragraph.

What should a clinic keep for a Class II refractometer?

A device register entry, the intended use in the clinic's own words, the manufacturer's instructions, the electrical safety documentation, the last verification of the reading against a reference, and a short note recording why the clinic treats the instrument as Class II.