Which wearing pattern is most closely associated with CLPU?

Which wearing pattern is most closely associated with CLPU?

• A. Daytime wear only
• B. Overnight wear
• C. No association with wear
• D. Contact lens wear with nap time removal

Answer: (B)

The key idea here is that contact lens peripheral ulcers are most strongly linked to extended wear, especially overnight use. When lenses stay on the eye for long periods, oxygen to the cornea is reduced and tear exchange is limited, creating a hypoxic and stress-filled environment at the lens edge. This, together with subtle mechanical irritation from the lens during sleep, promotes localized inflammation and ulceration near the limbus—the hallmark of CLPU. Removing lenses during naps can lessen this risk, and wearing patterns limited to daytime use don’t produce the same prolonged hypoxic stress. Identifying overnight wear as the pattern most associated with CLPU helps explain why prolonged, continuous lens wear is a major risk factor.

The key idea here is that contact lens peripheral ulcers are most strongly linked to extended wear, especially overnight use. When lenses stay on the eye for long periods, oxygen to the cornea is reduced and tear exchange is limited, creating a hypoxic and stress-filled environment at the lens edge. This, together with subtle mechanical irritation from the lens during sleep, promotes localized inflammation and ulceration near the limbus—the hallmark of CLPU. Removing lenses during naps can lessen this risk, and wearing patterns limited to daytime use don’t produce the same prolonged hypoxic stress. Identifying overnight wear as the pattern most associated with CLPU helps explain why prolonged, continuous lens wear is a major risk factor.