How can you distinguish a descemetocele from a full-thickness corneal perforation clinically and diagnostically?

• A. A descemetocele presents with leakage of aqueous; perforation shows Descemet's bulging.
• B. A descemetocele presents as a deep ulcer with Descemet's membrane bulging but no leakage; perforation shows leakage and iris exposure.
• C. They are the same condition and cannot be distinguished.
• D. Perforation occurs only in the presence of iris tissue prolapse.

Answer: (B)