Thanks for posting your query.
Few of the people have muddy sclera which appears to be yellow in color.
Kindly ask him whether he has any past history of jaundice
Sometimes jaundice at any time of life may cause discoloration of sclera permanently.
Does he has yellow discoloration of urine/ loss of appetite/ vomiting/ abdominal pain/ itching in body?
He should go for ultrasound
imaging along with repeat liver
If he is getting yellow colored stool with normal color urine then there is no chance of jaundice.
Dr. Mayank Bhargava