Samsung NX1000 User Manual page 78

If the flash fires when you capture a photo of a person in the dark,
a red glow may appear in the eyes. To correct the red-eye effect, select
Auto Red-eye or FiINn Red,
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Adjust the flash intensity to avoid overexposure or underexposure.
You can adjust it _+2levels.
Without red-eye correction With red-eye correction
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