Which of the following condition is typically associated with bilateral inferior lens subluxation of the lens?
**Core Concept**
Bilateral inferior lens subluxation is a characteristic feature of a specific ocular condition, involving the dislocation of the lens from its normal position. This condition is often associated with a systemic disease that affects the connective tissue, leading to lens instability.
**Why the Correct Answer is Right**
The correct answer is related to Marfan syndrome, a genetic disorder that affects the body's connective tissue. In Marfan syndrome, the connective tissue in the eye becomes weakened, leading to lens subluxation. The inferior subluxation of the lens is due to the zonular fibers, which are responsible for holding the lens in place, becoming stretched and weakened. The inferior subluxation is caused by the weight of the lens itself pulling it downward due to the weakened zonular fibers.
**Why Each Wrong Option is Incorrect**
**Option A:** Homocystinuria is another condition that can cause lens subluxation, but it typically affects the superotemporal aspect of the lens, not the inferior aspect.
**Option B:** Weakened zonular fibers can also be seen in other conditions, such as trauma or neoplastic processes, but Marfan syndrome is the most classic association with bilateral inferior lens subluxation.
**Option C:** Congenital glaucoma can cause lens subluxation, but it typically occurs unilaterally and is not associated with the inferior aspect of the lens.
**Clinical Pearl / High-Yield Fact**
Marfan syndrome is a systemic disease that affects multiple organ systems, including the eyes, heart, and skeleton. It is caused by mutations in the FBN1 gene and is inherited in an autosomal dominant pattern.
**Correct Answer:** C. Marfan syndrome