system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
The lens can be dislocated in all except -
assistant
The correct answer is  Ectopia lentis 

Ectopia lentis is defined as displacement or malposition of the crystalline lens of the eye.
The lens is considered dislocated (luxated) when it lies completely outside the lens patellar fossa.
The lens is described as subluxated when it is partially displaced but contained within the lens space. Causes are