Galaxy S9/S9+: What do I have to do when Iris scan do not work properly?
Check the following points if you notice that the device does not detect the Iris properly or Iris Scan feature is not working.
Check for something that prevents the camera from getting a good view of your irises (e.g. glasses, glare, low eyelids, recent eye surgery, or a medical condition).
Check if there is something that gets in the way of the camera or the LED (e.g. a screen protector, dirt, damage to the camera).
Check if you are wearing glasses with a strong prescription, glasses, sunglasses, color contact lenses, or circular contact lenses.
Check if the parts of your irises are hidden by narrowed or puffy eyes.
Check if the device is shaken or tilted too much.
Check if the device is lower than your face.
Check the location. When you scan your irises in places with strong sunlight, or in places with no light or low-light conditions, Iris scan may not work
Check the area around the iris recognition camera and LED is exposed to humid conditions or water.
Check if you have eye like the cornea is cloudy that affects the iris.
Check if you had undergone intraocular lens implant surgery or an eye surgery that scars the irises
Check if the camera and Iris Sensor are clean. Wipe it with clean cloth.
Check if there is any screen protectors or stickers on the sensors or ink and paint applied around the iris recognition camera or LED. If it has, then Iris scan will not work normally.
Check if you had undergone laser-assisted vision correction surgery, such as LASIK or LASEK. The refraction of light to your eyes will change because of the change in your cornea, and the device will not recognize your irises. Register your irises again before using the iris recognition feature.
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