How does the eye doctor check the infection?

[Arcadia Lakes]

Recently my eyes get aches a lot. But I don't know what caused this problem. Maybe I have got Keratitis. If I go to the eye doctor, how does he check for my infection?

[Arcanum]

First they will put eye drops in your eye, then they will use a special microscope to look into your eye for internal swelling or something. They also can detect the changes your eyes have when your eyes get infected.

[Arcata]

Usually the doctor will look into your eye directly to detect the infection.If yo do have,they may gave you antibiotics and eye drops.