<prompt> A patient presents to the emergency department with uniocular diplopia. Examination with oblique illumination shows golden crescent while examination with co-axial illumination show a dark crescent line. Which of the following is the most likely diagnosis?LenticonusColobomaMicrospherophakiaEctopia lentis  <response>: Ans. d Ectopia lentisRef: Ophthalmology by Khurana 2005p. 25; Clinical Examination in Ophthalmology by Mukherjee 2006166; Neema 6e, p. 285, 286Presence of uniocular diplopia together with finding of golden crescent on oblique illumination edge of subluxated lens or black crescent line on co-axial illumination edge of subluxated lens suggests a diagnosis of Subluxation of the crystalline lens. 