Quick facts
- An ophthalmic sponge is a named Class II entry in the United States at 21 CFR 886.4790 under product code HOZ.
- Canada names no ophthalmic sponge. A sponge that touches the surface of the eye is an invasive device, and Rule 2(1) of the Medical Devices Regulations places it in Class II.
- The same sponge is therefore Class II on both sides of the border, but the reason differs: the United States sorts it by a named entry, Canada sorts it by the contact it makes.
- A sponge, pad or spear intended to remain in contact with the eye for 30 consecutive days or more moves to Class III under Rule 2(3).
- A sponge used only on intact skin away from the eye is not an invasive device, and falls to Class I under Rule 7(1).
- The regulation text quoted here is current to 2026-09-21 and was last amended on 2026-06-17.
An ophthalmic sponge is an absorbent sponge, pad or spear that a surgeon uses to soak fluid from the operative field during eye surgery. It looks like ordinary gauze, yet it carries a device class in both countries because of where it is placed. The two rulebooks reach a similar number by two different routes, and the route decides the paperwork.
What is an ophthalmic sponge?
The United States describes the product in its own words. Under 21 CFR 886.4790, an ophthalmic sponge is a device that is an absorbant sponge, pad, or spear made of folded gauze, cotton, cellulose, or other material intended to absorb fluids from the operative field in ophthalmic surgery.
Three things in that sentence matter. The material is open — gauze, cotton, cellulose or anything similar. The physical form is open — sponge, pad or spear. What is fixed is the use: it absorbs fluid from the operative field. A clinic that buys the same folded gauze for a dressing tray and for eye surgery is buying one article and, for the eye use, a regulated device.
That is why the class does not travel with the material. It travels with the claim on the label and the site the product is placed on.
How do Canada and the United States classify an ophthalmic sponge?
The sponge is Class II in both countries, but the two texts arrive there by different logic.
| Item | Canada | United States |
|---|---|---|
| Ophthalmic sponge | Class II by Rule 2(1) | Class II, 21 CFR 886.4790 |
| Basis named in the rulebook | The contact it makes with the eye | A named entry and product code (HOZ) |
| What decides the class | Whether it comes into contact with the surface of the eye | Which named entry it is filed under |
| Same material used away from the eye | Class I by Rule 7(1) | Depends on the entry claimed |
| Sponge intended to stay 30 days or more | Class III by Rule 2(3) | Still the same named entry |
| Result of the difference | A licence and a quality-system certificate | A Class II entry under general and special controls |
In the United States the sponge is a named entry, and a product filed under that entry is Class II. In Canada no entry names a sponge. The Regulations instead define an invasive device as a device that is intended to come into contact with the surface of the eye or to penetrate the body, and Rule 2(1) classifies every invasive device that penetrates a body orifice or touches the surface of the eye as Class II.
A sponge does not penetrate anything and it is not absorbed, so the subrules that turn on penetration do not apply. What applies is contact with the surface of the eye. That single contact is the whole test.
Why does the same gauze change class with the site of use?
Because the Canadian rule reads the site, not the object.
Rule 2(1) sets the base class at II for a device that touches the surface of the eye. Rule 2(2) steps a device down to Class I only when it is placed in the oral or nasal cavity as far as the pharynx, or in the ear canal up to the ear drum — none of which is the eye. Rule 2(3) steps a device up to Class III when it is normally intended to remain in contact with the surface of the eye for at least 30 consecutive days. Rule 2(4) covers a device presented as preventing the transmission of infectious agents during sexual activity, which is not this product.
A surgical sponge sits in the first of those bands. It touches the eye and it is withdrawn at the end of the case, so the base rule gives Class II and neither the step-down nor the step-up applies. The design rule is easy to state: read the contact, then read the duration, then read the exceptions. A sponge described as staying on the eye for a month is no longer a Class II sponge.
Which licence and records differ between Canada and the United States?
For a supplier the class is not a label; it decides which paperwork has to exist before the sponge can be sold.
In the United States a Class II device reaches the market through premarket notification under section 510(k) unless the entry is specifically exempt. In Canada a Class II device needs a medical device licence before sale under section 32 of the Regulations, and a licence application is supported by a quality-system certificate against ISO 13485, together with the labelling and evidence the Regulations set out. A supplier that treats the sponge as a Class I accessory and ships it into Canada without a licence is holding a Class II device with no licence.
That is the practical cost of the difference. The gauze itself is unchanged. What changes is that the Canadian pathway expects a licensed Class II device and a quality-system certificate, while the US pathway for the same item rides on a named Class II entry and a 510(k) unless exempt.
What do the two rulebooks actually say?
The two texts are short, and the difference between them is the whole point of this article.
| Rule or entry | Verbatim wording | Effect on an ophthalmic sponge |
|---|---|---|
| Definition, Canada | invasive device … come into contact with the surface of the eye or penetrate the body | A sponge placed on the eye is invasive |
| Rule 2(1), Canada | all invasive devices that penetrate the body through a body orifice or that come into contact with the surface of the eye are classified as Class II | Class II |
| Rule 2(3), Canada | remain in the body or in contact with the surface of the eye for at least 30 consecutive days is classified as Class III | Applies only to a long-wear product |
| Rule 7(1), Canada | all other non-invasive devices are classified as Class I | Applies only when the sponge stays off the eye |
| 21 CFR 886.4790, US | Ophthalmic sponge | Named Class II entry, product code HOZ |
Read together, the five lines explain why a supplier cannot move the class by relabelling. A sponge described as non-invasive while it is laid across the surface of the eye is described against the text, not against the product.
Which consumables does an ophthalmic surgical tray restock?
A clinic that runs eye procedures runs on the same bench supplies as any other treatment room. The sterile gauze sponges are the absorbent item that a case pulls from, and the double-tipped cotton swabs handle the lid margin prep that comes before a drape is placed. A clinic that monitors its own steriliser pairs the sterilization monitoring collection with the 24-hour monitoring five-pack trial. Clinics and multi-site groups ordering at case level use the wholesale ordering page, and the B2B wholesale collection lists the lines held for institutional buyers. Reselling? become a distributor.
Sources
- 21 CFR 886.4790, Ophthalmic sponge
- 21 CFR 886.4750, Ophthalmic eye shield
- 21 CFR 886.1380, Diagnostic condensing lens
- 21 CFR 886.1800, Schirmer strip
- Medical Devices Regulations, SOR/98-282, full text
- openFDA device classification API
- ISO 13485:2016, medical devices quality management
- ISO 14971:2019, risk management for medical devices
- ISO 15004-1:2020, ophthalmic instruments, general requirements
- College of Optometrists of Ontario, standards of practice
- Opto, eye health library
- American Academy of Ophthalmology, eye health
- Public Health Ontario, laboratory services test index
- CCOHS, OSH answers
- Canadian Dental Association
- Royal College of Dental Surgeons of Ontario
- CLSI, clinical and laboratory standards
- Government of Canada, medical devices guidance
- Standards Council of Canada
- 21 CFR 886.1405, Ophthalmic trial lens set
A count of how many sponges a case opens is a count that cannot be reconstructed later. The printable sponge and consumable count sheet is a blank form with columns for the case, the item, the lot and the tally, so a shortfall is visible on the day rather than at the next audit. The count sheet generator on the same page sizes the form to the number of trays a room runs. No account and no sign-up are needed to open either one.
Every surgical setup is different. Ask a compliance specialist and you will get a written answer specific to your equipment and province, with the regulation or standard it is based on cited.
Related reading
- Eye Pads in Canada vs the US: Ophthalmic Dressing Pads
- Eye Shields in Canada vs the US: Which Device Rules Apply?
- Ophthalmic Trial Lens Frames in Canada vs the US: Which Class?
CliniEco Medical supplies eye care, laboratory and dental consumables of the kind described in this article. MDEL #35334. This article is written for optometry, laboratory and procurement professionals and is not legal advice; the class of a device and the records kept by a clinic belong to the manufacturer and to the requirements that apply to it.
Frequently Asked Questions
Is an ophthalmic sponge a Class II device in the United States?
Yes. An ophthalmic sponge is a named Class II entry at 21 CFR 886.4790, filed under product code HOZ.
How does Canada classify the same sponge?
Because the sponge comes into contact with the surface of the eye it is an invasive device, and Rule 2(1) of the Medical Devices Regulations places it in Class II.
Is folded gauze always a device?
No. The class follows the claim and the site of use. The same gauze used away from the eye is a non-invasive device and falls to Class I under Rule 7(1); used on the surface of the eye it is Class II under Rule 2(1).
Does the sponge have to stay on the eye to stay Class II?
No. The base class is set by contact with the surface of the eye, which gives Class II for a sponge used and removed within a case. A sponge intended to remain in contact with the eye for at least 30 consecutive days moves to Class III under Rule 2(3).
What does the class change for a supplier?
A Class II device sold in Canada needs a medical device licence under section 32 supported by a quality-system certificate against ISO 13485. In the United States the same item rides on a named Class II entry and a 510(k) unless the entry is exempt.
Why does each country reach the same class by a different route?
Because each sorts the product by a different idea. The United States sorts the sponge by its named entry, and Canada sorts it by the contact it makes with the surface of the eye.
0 commentaire