What is for blue light in galaxy s5minyif on left side at the corner

[Android Central Question]

Sometimes I see blue light on the corner appear when I make a call or I get call and every few seconds I see a sign like an eye what does it mean

 

[B. Diddy]

Welcome to Android Central! The eye icon could be Smart Stay: https://forums.androidcentral.com/e...t-stay-in-samsung-galaxy-s5%2F&token=GccyHsp3