Which term describes complete displacement of the lens?

Which term describes complete displacement of the lens?

• A. Lens luxation
• B. Aphakia
• C. Anisocoria
• D. Phacodonesis

Answer: (A)

Complete displacement of the lens is described as lens luxation. When the lens is fully displaced, it can lie in the anterior chamber or drop into the vitreous cavity, which is different from a partial displacement known as ectopia lentis where the lens is decentered but not completely out of place. Aphakia means the absence of the lens altogether, not displacement. Anisocoria refers to unequal pupil sizes, and phacodonesis is a trembling or unstable lens due to weak zonules, not a full dislocation. Luxation specifically denotes the lens having moved completely from its normal position, making it the correct term.

Complete displacement of the lens is described as lens luxation. When the lens is fully displaced, it can lie in the anterior chamber or drop into the vitreous cavity, which is different from a partial displacement known as ectopia lentis where the lens is decentered but not completely out of place. Aphakia means the absence of the lens altogether, not displacement. Anisocoria refers to unequal pupil sizes, and phacodonesis is a trembling or unstable lens due to weak zonules, not a full dislocation. Luxation specifically denotes the lens having moved completely from its normal position, making it the correct term.