A 45-year-old man with Marfan syndrome is found to have bilateral superotemporal subluxation of the crystalline lens. The most appropriate term for this condition is:
- A Ectopia lentis ✓
- B Phacomorphic glaucoma
- C Spherophakia
- D Microspherophakia
Correct answer: A. Ectopia lentis
Explanation
Ectopia lentis refers to displacement of the crystalline lens from its normal position due to zonular weakness or rupture. In Marfan syndrome (fibrillin-1 mutation), the lens typically subluxates superiorly and temporally. In homocystinuria, the displacement is inferonasal. Spherophakia describes an abnormally spherical (ball-shaped) lens, while microspherophakia is a small, spherical lens — distinct conditions from ectopia lentis.
Reference: Khurana Comprehensive Ophthalmology, 7th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.