My daughter is 5 and a half months old and she is on  exclusive breastfeeding..there is a white patch on the skin visible on the inner angle of both her eyes..it has been come to notice since she was 3 months old..no other body part has white patches or discoloration..no family history on paternal or maternal side..she is just on vitamin D3 supplement..no other supplements is given to her.. Is this a cause of deficiency in calcium or vitamins?? Have shared the pic for your reference