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Monika Wassermann, Medical Director at Oliolusso, blue-yellow colour blindness causes people to mistake the blue shades or colours for green and yellow colours for green.
She explained: “Though it’s rare, it can affect both genders and can be acquired from various factors.
“Insufficient vitamin B12 levels in the body can lead to the destruction of the optic nerve which impacts how the brain and eyes communicate and transmit visual signals.
“Impairment of these parts can lead to blurry vision and confusion of various colour shades.”