Question
What's the diagnosis?
Answer
Lens dislocation occurs when the lens is displaced posteriorly into the vitreous humor or posterior chamber. This typically occurs post-surgery or as the result of trauma, but it can also be secondary to a genetic predisposition (eg, connective tissue disorder).
- A complete lens dislocation will appear as a hyperechoic annular structure that is usually mobile in the vitreous humor or posterior chamber
- A partial lens dislocation may show the lens in the normal position while the patient is supine but show that it is detached when the patient is sitting upright, or it may show one side detached.
Photo Credit: Dr. Michael Sullivan
References
Pierre VA, Smith T, Salerno A. Ocular Ultrasound. Emerg Med Clin North Am. 2024 Nov;42(4):891-903. doi: 10.1016/j.emc.2024.05.009. Epub 2024 Aug 17. PMID: 39326993.