Quick facts
- A ptosis crutch is a wire or plastic support mounted on spectacles to hold a drooping upper eyelid open for a patient whose lid lift has been weakened.
- United States: the crutch is reached as a ptosis crutch at 21 CFR 886.5600, placed in Class I; the entry states that the device is exempt from premarket notification.
- Canada: the crutch is a non-invasive device that rests on the skin of the brow and the lid, so it reaches Class I through Rule 7(1) of Schedule 1 to the Medical Devices Regulations, SOR/98-282, which catches all other non-invasive devices.
- The two countries land on the same class: Class I in the United States and Class I in Canada, by different machinery.
- The crutch is an accessory to the spectacles, so it is ordered against the frame and the prescription rather than as a standalone device.
- The entry and rule text below were checked against the current CFR text and the Regulations on 2026-10-09.
A ptosis crutch is the small support a patient wears on their spectacles when the upper eyelid no longer lifts on its own. It is made for a lid weakened by age or by a nerve or muscle condition, and it works by holding the lid open mechanically rather than by touching the eye. It is filed as a device in both countries, and it is the unit the patient wears rather than the lens in front of it. This article sets out what the crutch does, how each country files it, and what a practice should be able to point at when the crutch is fitted and when the frame is changed.
What is a ptosis crutch?
The crutch is a shaped wire or a moulded plastic bar that is fixed to the eyewire or the brow bar of a pair of spectacles. When the frame is worn, the bar rests under the margin of the upper lid and holds it clear of the pupil. The height of the bar, the width of the bridge and the position of the support over the lid are the three settings that decide whether the lid is held open without pressing on the globe.
The device does not enter the body and does not sit on the surface of the eye. It rests on intact skin, and that single fact is what fixes its class in Canada and what keeps it apart from an eye device that touches the cornea.
How does the United States file a ptosis crutch?
In the United States the crutch is reached by a named entry. 21 CFR 886.5600 covers a ptosis crutch, and the section places it in Class I. The entry describes a device intended to be mounted on the spectacles of a patient with ptosis, and it notes that the device is exempt from the premarket notification procedure.
A Class I device of this kind is subject to general controls, and the entry turns on what the crutch does rather than on the material it is made of. A wire support and a moulded support reach the same entry, because both hold the lid in the same way.
Why does Canada reach Class I through the non-invasive rule?
Canada does not keep a named entry for the crutch. The Rules in Schedule 1 classify a device by how it meets the body, and the crutch neither enters the body nor contacts the surface of the eye, so it is a non-invasive device. Rule 4 reaches a non-invasive device intended to contact injured skin, which does not describe a crutch worn over an intact lid. Rule 7(1) then applies: all other non-invasive devices are classified as Class I.
The two exceptions in Rule 7(2) do not catch the crutch either. A device is lifted to Class II where it is intended to act as a calibrator, tester or quality control support to another device, or where it is intended to be connected to an active device of Class II or higher. A crutch does neither, so it stays in Class I.
| Item | Canada | United States |
|---|---|---|
| Class | Class I, by Rule 7(1) | Class I |
| Named entry | No entry names the crutch; it is a non-invasive device | 21 CFR 886.5600 |
| Basis of the class | The rule that fits a non-invasive device | The named entry the crutch is filed under |
| Body contact | Intact skin of the brow and lid | Intact skin of the brow and lid |
| Premarket route | No device licence for a Class I device | General controls, exempt from premarket notification |
| Quality system | The manufacturer keeps the records the Regulations require | The manufacturer keeps the records the regulation requires |
The two countries agree on the class and disagree only on the machinery: the United States names the crutch and Canada reaches it through the rule for a non-invasive device. A practice that keeps the maker's fitting sheet with the frame has the document the class implies.
Which standards sit behind the crutch?
The class says how the crutch is regulated; the standards say how it has to behave. ISO 13485:2016 is the quality management basis behind the manufacturer's records, and ISO 14971:2019 is the risk management basis behind the design file. A practice that asks for those two documents is asking for the evidence behind the fit the crutch claims.
| Element | What it covers | Why it matters at the frame |
|---|---|---|
| Support height | How high the lid is held | A support set too high presses on the globe |
| Bridge width | Where the crutch sits on the nose | A bridge off its width lets the crutch ride |
| Material | The wire or moulding used | A material that fatigues loses its set |
| Finish | The surface that touches the lid | A rough edge irritates the skin it rests on |
| Fit record | The frame and the setting fitted | The link between a crutch and the frame it was made for |
| Directions for use | Fitting and care | The step that keeps the lid clear without pressure |
A crutch that cannot show the frame it was fitted to and a frame that cannot be traced to the fitting are the two gaps that meet on the same bench.
How is a ptosis crutch fitted and reviewed?
A crutch is fitted against the frame rather than against the lid alone. The clinician sets the support so that the lid margin clears the pupil while the patient looks ahead, and then checks that the brow and the lid are not pressed where the crutch rests. The fitting is reviewed when the frame changes or when the lid position drifts, because a support set to yesterday's lid no longer holds to-day's opening.
The review is a fitting record. It carries the frame, the setting and the date, and it is the one document a practice can point at to show that the crutch was made to the spectacles it is worn with and that the lid was checked after it was set.
What else sits beside the crutch?
A practice that fits a crutch often stocks the lid and eye care lines beside it. A reusable moist heat eye compress is the home step for a lid that is also being managed for dryness, and a USB heated eye mask is the daily lid-warming item a patient may be asked to keep. Clinics that monitor their own reprocessing pair the sterilization monitoring collection with the 24-hour biological indicator 50-pack. 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 886.5600, ptosis crutch
- openFDA device classification API
- Medical Devices Regulations, SOR/98-282, full text and Schedule 1
- US FDA, medical devices
- US FDA, medical device databases
- US FDA, overview of device regulation
- Health Canada, medical devices
- Standards Council of Canada
- CSA Group
- ISO 13485:2016, medical devices quality management
- ISO 14971:2019, risk management of medical devices
- Canadian Association of Optometrists
- College of Optometrists of Ontario
- CCOHS, OSH answers
- American National Standards Institute
- US FDA, contact lenses
A patient who wears a ptosis crutch is followed on paper as well as at the frame. The printable fitting and review sheet is a blank form with columns for the patient, the frame, the lid height, the fitting date and the clinician, so a practice can show the fit it delivered and the day it was checked.
The fitting sheet generator on the same page sets the number of rows to the number of fittings a practice books, so a single optometrist and a multi-site group print the same form at two volumes.
Every practice and every frame differs. 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 shields in Canada vs the US: which device rules
- Ophthalmic trial lens frames in Canada vs the US: which class
- Intraocular lenses 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 practice belong to the manufacturer and to the requirements that apply to it.
Frequently Asked Questions
What class is a ptosis crutch in Canada?
It is a non-invasive device that rests on intact skin, so where no earlier rule catches it, it reaches Class I through Rule 7(1) of Schedule 1 to the Medical Devices Regulations.
What class is a ptosis crutch in the United States?
It is a named entry at 21 CFR 886.5600 in Class I, and the entry states that the device is exempt from the premarket notification procedure.
Do the two countries agree on the class?
Yes. The crutch is Class I in the United States and Class I in Canada, reached by a named entry on one side and by the non-invasive rule on the other.
Does the crutch touch the eye like a contact lens?
No. It rests on the skin of the brow and the lid and does not contact the surface of the eye, which is why it is not drawn to the invasive-device rule for eye devices.
When would a lid support become Class II in Canada?
Rule 7(2) lifts a non-invasive device to Class II where it acts as a calibrator, tester or quality control support to another device, or where it connects to an active device of Class II or higher, and a crutch does neither.
Why is the crutch ordered with the frame?
The crutch is fixed to the spectacles, so it is made to the frame and the prescription it is worn with rather than supplied as a standalone device.
What should a practice record when a crutch is fitted?
The patient, the frame, the lid height and the fitting date, kept as a fitting record. That is the link between the crutch and the frame it was made for.
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