<prompt> Posterior lenticonus is seen in ?Alpos syndromeLowes syndromeMarfan syndromeHomocystinuria  <response>: Ans. is b i.e., Lowes syndrome Lenticonus refers to cone-shaped elevation of the anterior pole anterior lenticonus or posterior pole posterior lenticonus of the lens. Anterior lenticonus is seen in Alpos syndrome. Posterior lenticonus is seen in Lowes syndrome. On distant direct ophthalmoscopy, lenticonus present as an oil globule lying in the center of red reflex. Slit-lamp examination confirms the diagnosis. 