This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anaesthesia
Most common infection in contact lens users is? 
Select and explain. 
A. Streptococcus, B. Pseudomonas, C. Staphylococcus, D. Neisseria
B: Pseudomonas
Answer: B: Pseudomonas 
Explanation: Ans. is 'b' i.e., Pseudomonas Complications of contact lens wear Complications of contact lens wearing are : ? Intolerance :- Some people find wearing contact lenses intolerable. Corneal complications :- Corneal abrasion, Corneal edema, Corneal vascularization, Microbial keratitis (Pseudomonas, acanthamoeba), Sterile corneal infiltrate. Giant papillary conjunctivitis Hypoxia :- Cornea is deprived of oxygen from the tear film by the presence of the contact lens. The cornea becomes edematous and new vessels may develop in the limbal area. Sensitivity :- This may develop in response to the preservative (thiomersal) in the cleaning and soaking solution. This results in allergic conjunctivitis.