Free · runs on your device
Pupillary distance helper
Pupillary distance is the space between the centers of the pupils, in millimeters. Shops measure it because lenses have to sit in front of the pupils.
This page scales that distance from the iris in a photo that stays in your browser. An average iris is about 11.7 mm, so an angled photo will be off. Confirm the number before you order.
- Cost
- Free
- Time
- Under a minute
- Signup
- None
- Data
- Stays on device
Your photo
Add a photo to measure
Face the camera straight on, hair off the face, even light, no filter.
- 1Add your photoCamera or a file. Either stays on this device.
- 2Mapped in your browser478 landmarks find the zones. The picture is not uploaded.
- 3Your measured resultNumbers from this photo, drawn on the picture.
Add a photo. It stays in this browser.
- On-device, never uploaded
- 478 landmarks
- Free, no signup
In the app
Want a record of pupillary distance helper, not a one-off?
Pupillary distance helper on this page is a single reading. The app saves a scan and the routine that followed it, so the next photo has a baseline.
- Six saved scores: hydration, texture, tone, acne, pores, and redness
- A morning and evening routine built from the scan
- The same face, week after week, so a change shows up as a trend
Scan with your phone. iPhone opens the App Store. Android opens Google Play.
The science
What pupillary distance helper measures, and how this page does it
- 01
One question, answered from this photo
Pupillary distance helper uses the face in the frame, not a questionnaire. Pupillary distance scaled from the iris. Average iris diameter is taken as 11.7 mm, then the pixel distance between iris centers is converted to millimeters.
- 02
Landmarks first, then the number
The photo is drawn to a canvas in your browser. A face landmark model marks 478 points so the measurement uses the face, not the background. Nothing is uploaded.
Iris-center landmarks (468 and 473 in the face mesh) set the span. If the two irises differ in apparent size by more than about 20 percent, the photo is angled and the millimeter figure is flagged.
- 03
The result on this page, and the record in the app
Pupillary distance scaled from the iris. Average iris diameter is taken as 11.7 mm, then the pixel distance between iris centers is converted to millimeters.
The AISkincare app keeps a scan: hydration, texture, tone, acne, pores, and redness, then builds a morning and evening routine from those scores. This page answers once and does not store the photo.
- 04
What will throw the number off
Do not order prescription lenses from this estimate alone. Near PD and distance PD are different.
An optician's pupilometer is the number to order glasses with. This helper is a preview. A turned face or a very close lens pushes the estimate outside the usual adult range, and the page says so.
How to read a pupillary distance helper result
Iris-center landmarks (468 and 473 in the face mesh) set the span. If the two irises differ in apparent size by more than about 20 percent, the photo is angled and the millimeter figure is flagged.
Use the steps under the tool as the procedure: same light, same distance, same expression, whenever you want a second reading to mean something. The app is where a series of scans can sit next to a routine. This page is the single measurement.
A setup that makes a second photo comparable
Daylight from a window, phone at eye level, an arm's length away, hair off the zones the tool needs, no beauty filter. Tilt in the chin or a camera held low changes several face measurements at once.
If the page warns that the photo looks angled, or that a distance falls outside a usual range, retake before you act on the figure.
One photo is a point. A month is a line.
Pupillary distance helper on a Tuesday includes the light in the room. The same check in the same window next month is the comparison that can show a change. Stacking random selfies from different rooms mostly shows the rooms.
Scan the QR code under the tool with the phone you will keep using. An iPhone is sent to the App Store and an Android phone to Google Play, so the history starts in the right store.
What pupillary distance helper will not claim
An optician's pupilometer is the number to order glasses with. This helper is a preview. A turned face or a very close lens pushes the estimate outside the usual adult range, and the page says so.
Do not order prescription lenses from this estimate alone. Near PD and distance PD are different.
How to use the result
- Look straight into the camera with both eyes open.
- Hold the phone at eye level, not from below.
- Order glasses only with a value you trust, ideally from an optician.
Where to go from here
If one part of the result stood out, open the tool that asks only that question. Each one states its limit in the same place, and each one links back to a guide when a longer explanation helps.
- True mirrorFlip a photo in the browser so you see the face other people see. The image stays on your device and is not uploaded.
- Facial harmony notesA plain explanation of proportion talk online, including PSL-style charts, and why AISkincare will not score how attractive you are.
- Golden ratioCompare face length, width, and thirds from a photo with the classical 1.618 diagram. Measured on your device, without an attractiveness score.
- Canthal tiltMeasure the angle of each eye from inner corner to outer corner. Positive means the outer corner sits higher. Your photo is not uploaded.
Do not order prescription lenses from this estimate alone. Near PD and distance PD are different.