Written and maintained by CASRAI Editorial Board
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This page describes products and general use; it is not medical advice.
A colposcope is a low-magnification, light-illuminated device that lets an examiner look closely at the cervix and nearby tissue from outside the body. This page is for clinic staff, buyers and students who need to know what the device is, what its specifications mean, and how US regulators classify it.
What is a colposcope?
A colposcope is a device for viewing the tissues of the vagina and cervix through a telescopic system located outside the vagina. In the US federal regulation that defines it (21 CFR 884.1630, checked 2026-10-30), it is used to diagnose abnormalities and to select areas for biopsy. The United Nations Population Fund (UNFPA) procurement specification describes it as a device used to examine the lower genital tract epithelium, including tissues of the cervix, vulva, vagina and anogenital areas.
Who uses it: examiners who perform colposcopy, the visual examination of the cervix and other anogenital tissue. Clinic staff and buyers handle the equipment around it.
How a colposcope is built
The federal regulation says the generic device type may include a light source, cables and component parts. The UNFPA specification lists three functional requirements:
- a head housing the optics, capable of magnification and focus;
- a light source and green light filters for improved visualization of vasculature;
- a stand body that facilitates biopsy and excisional treatment.
The same specification lists the user-adjustable settings as coarse and fine optical magnification and illumination, with an illumination adjustment knob and, for halogen units, a fan to cool the bulbs. Listed accessories, consumables and spare parts include a stand or mount for hands-free operation, an optional medical-grade monitor if one is not integrated, a single-use sheath for invasive portable models, and lamp bulbs and fuses.
Colposcope magnification: how strong is it?
A colposcope is a low-magnification instrument, not a high-power microscope. The UNFPA specification asks for a range of optical magnification from 3x to 15x, either stepped or continuously variable. It describes the field as an area of approximately 20 to 30 mm in diameter on the cervix, viewed from far enough away to leave room for the instruments needed during examination or treatment.
Types and variants
| Variant | What the source says | Source |
|---|---|---|
| Stepped or continuously variable magnification | Either is acceptable within the 3x to 15x range. | UNFPA specification |
| Halogen or LED illumination | Either light source type is allowed; both must provide full-spectrum white light. | UNFPA specification |
| Green or blue filter | Green filters are specified; blue filters are acceptable but not the preferred option. | UNFPA specification |
| Standard colposcope (colpomicroscope) | White light source only, no filter other than green, no image analysis software, not smartphone-based. Exempt from premarket notification, subject to the limits in 21 CFR 884.9. | 21 CFR 884.1630(b) |
| Colposcope with image analysis software, other filters or a smartphone base | Falls outside the exemption conditions above. The regulation still classifies the generic type as Class II (special controls). | 21 CFR 884.1630(b) |
| Invasive portable model | The accessory list names a single-use sheath for this kind of unit. | UNFPA specification |
Specifications that matter
These values come from one procurement specification, the UNFPA colposcope specification, and describe what that agency asks for, not a universal standard.
| Specification | Value in the UNFPA specification |
|---|---|
| Optical magnification | 3x to 15x, stepped or continuously variable |
| Illumination | Halogen or LED, full-spectrum white light |
| Halogen light | 15 V / 150 W, with a cooling fan |
| LED light | 20,000 to 35,000 lux at 300 mm working distance |
| Light intensity control | Illumination adjustment knob |
| Filters | Green (blue acceptable, not preferred) |
| Ingress protection | IPX2 minimum |
| Power | Reliable power source; plug type set by country and setting of use |
How to choose
Two published criteria sets apply, and they answer different questions.
- Regulatory status. Under 21 CFR 884.1630(b), a colposcope that uses only white light plus at most a green filter, has no image analysis software and is not smartphone-based is exempt from premarket notification. A unit with any of those features does not meet the exemption conditions as written.
- Technical requirements. The UNFPA specification sets the magnification range, light source values, filter type and ingress rating shown in the table above, and asks for a stand body that supports biopsy and excisional treatment.
Safe use and handling basics
Use, cleaning, reprocessing and sheath handling are set by the manufacturer’s instructions for use for the specific model, and examination itself is a clinical activity outside the scope of this page. At the equipment level, the UNFPA specification asks for a reliable power source, a cooling fan on halogen units so the bulbs are cooled, and an IPX2 minimum ingress rating.
Common mistakes
- Treating a colposcope as a microscope. The specified range is 3x to 15x over a field of roughly 20 to 30 mm.
- Assuming every colposcope is exempt from premarket notification. The exemption in 21 CFR 884.1630(b) applies only to units that meet all of its conditions.
- Applying the UNFPA values as a universal rule. They are one agency’s procurement specification.
- Overlooking accessories and spares. The specification lists a stand or mount, bulbs and fuses, and a single-use sheath for invasive portable models.
Frequently asked questions
What is a colposcope?
A colposcope is a device that lets an examiner view the cervix and vaginal tissue through a telescopic system outside the body. Under 21 CFR 884.1630 it is used to diagnose abnormalities and select areas for biopsy; it may include a light source, cables and component parts.
What is colposcope magnification?
The UNFPA specification calls for optical magnification of 3x to 15x, either stepped or continuously variable. That is low magnification, used over a cervical area of roughly 20 to 30 mm in diameter.
Is a colposcope a regulated medical device in the US?
Yes. 21 CFR 884.1630(b) classifies it as Class II (special controls). A standard colposcope with only a white light source (plus an optional green filter), no image analysis software and no smartphone base is exempt from premarket notification, subject to the limitations in 21 CFR 884.9.
Why does a colposcope have a green filter?
The UNFPA specification lists the light source and green light filters as providing improved visualization of vasculature.
Related reading
For other device explainers and regulatory context, see what a cervical collar is, FDA’s eSTAR submission template for 510(k) and De Novo and the Medical Device Amendments of 1976. Clinics building out an exam room can also use the community clinic supply checklist. Related supplies are listed under gynecology and urology supplies.
Sources
- eCFR, 21 CFR 884.1630, Colposcope, version dated 2026-10-01, checked 2026-10-30.
- UNFPA Global Supply, Colposcope product specification (item 1002028), checked 2026-10-30.
