Spontaneous Anterior Dislocation of a Microspherophakic Cataractous Lens in a Non-Syndromic Adult: A Case Report

Microspherophakia is a rare abnormality of the crystalline lens, marked by reduced equatorial diameter and increased lens thickness. We report a rare case of spontaneous anterior dislocation of a cataractous microspherophakic lens in a 50-year-old non-syndromic female who presented with sudden, painless vision loss in the right eye. Slit-lamp examination revealed a small, spherical lens dislocated into the anterior chamber, with no signs of trauma or inammation. Systemic assessment revealed no features suggestive of associated syndromes such as Marfan or Weill–Marchesani. The patient underwent successful intracapsular lens extraction followed by retropupillary iris-claw intraocular lens implantation, resulting in a best-corrected visual acuity of 6/12. Family screening identied bilateral microspherophakia in her son, indicating a likely hereditary etiology. This case highlights the importance of recognizing isolated microspherophakia as a potential cause of spontaneous lens dislocation in adults and emphasizes the value of timely surgical intervention and family evaluation.