Samsung SM-G950W User Manual page 189

Settings
Registering irises
The device can save the iris data of one person only. You cannot register more than
one set of irises.
1
On the Settings screen, tap Lock screen and security → Iris Scanner.
2
Unlock the screen using the preset screen lock method.
If you have not set a screen lock method, create one.
3
Read the on-screen instructions and tap CONTINUE.
To register only one iris of your eyes, tap Register just one iris.
4
Hold the device with the screen facing towards you and look at the screen.
5
Position your eyes inside the circles on the screen and open your eyes wide.
The iris recognition camera will scan your irises.
25-35 cm
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