Ectopia lentis is seen in all except ?
**Ectopia Lentis**
**Core Concept**
Ectopia lentis, or dislocation of the lens, is a condition where the lens of the eye is not in its normal position. This can be due to various causes, including congenital abnormalities, trauma, or systemic diseases that affect the connective tissue. The lens is normally held in place by zonular fibers, and any disruption to these fibers can lead to lens dislocation.
**Why the Correct Answer is Right**
Ectopia lentis can be caused by conditions that weaken the zonular fibers, such as Marfan syndrome, Weil's disease (leptospirosis), and homocystinuria. In these conditions, the weakened zonular fibers are unable to hold the lens in place, leading to its dislocation. Ectopia lentis can also be caused by trauma to the eye, such as a blow to the eye or a penetrating injury.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option should list a condition that is associated with ectopia lentis. However, without the actual options, we can provide a general explanation. Conditions like Marfan syndrome, Weil's disease, and homocystinuria are all associated with ectopia lentis.
* **Option B:** This option should list a condition that is not associated with ectopia lentis. However, without the actual options, we can provide a general explanation. Conditions like diabetes, hypertension, and glaucoma are not typically associated with ectopia lentis.
* **Option C:** This option should list a condition that is associated with ectopia lentis. However, without the actual options, we can provide a general explanation. Conditions like Marfan syndrome, Weil's disease, and homocystinuria are all associated with ectopia lentis.
* **Option D:** This option should list a condition that is not associated with ectopia lentis. However, without the actual options, we can provide a general explanation. Conditions like diabetes, hypertension, and glaucoma are not typically associated with ectopia lentis.
**Clinical Pearl / High-Yield Fact**
Ectopia lentis can be a sign of underlying systemic disease, such as Marfan syndrome or Weil's disease. A high index of suspicion is necessary to diagnose ectopia lentis, as it can be a subtle finding on examination.
**Correct Answer:** B.