CIE vs infection

Question 1

What’s the difference with pain?

Answer 1

-cie is mild to moderate like a foreign body sensation
-infection pain is severe

Question 2

What’s the difference with photophobia?

Answer 2

-cie is mild
-infection is moderate/severe

Question 3

What’s the difference with vision

Answer 3

-cie is usually not affected
-infection vision is compromised