<prompt> Which one of the following statements, concerning persistent hyperplastic primary vitreous PHPV is not true?It is generally unilateralVisual prognosis is usually goodIt may calcifyIt is most easily differentiated from retinoblastoma by the presence of exophthalmos or cataract.  <response>: B i.e. Visual prognosis is usually good Persistent Hyperplastic Primary Vitreous PHPV It is persistence of the primary viterous hyaloid aerial system. Almost always unilateralQ -90 Presents as white pupillary reflex in the new born congenital leukocoriaQ It is usually associated with - CataractQ - Glaucoma - Long extended ciliary processes because of pull from contracted retrolental tissue. - MicrophthalmosQ - Intraocular haemorrhage - Tractional RD Investigations: USG CT Scan DD with Retinoblastoma on the basis of microphthalmia elongated ciliary processes If diagnosed early, TT is aspiration of lens, excision of retrolental membrane and vitrectomy Visual prognosis is poorQ. 