Which of the following is a sign of anterior lens luxation?

• A. Shallow anterior chamber
• B. Hyperopia
• C. Pupil constriction
• D. Retinal detachment

Answer: (A)

When the crystalline lens luxates anteriorly, it shifts toward the cornea and crowds the space in the front of the eye. That forward displacement narrows the depth of the anterior chamber, often making it shallow or even flat. This shallow anterior chamber is the hallmark sign of anterior lens luxation and can lead to pupillary block and acute angle-closure glaucoma if not treated. Hyperopia isn’t a reliable sign of lens luxation, a constricted pupil isn’t typically associated with this condition, and retinal detachment is a separate issue that isn’t a direct result of the lens moving forward.