Posterior lenticonus with congenital cataract in a Shih Tzu dog

A seven-month-old, male Shih Tzu dog weighing 3.7 kg had an immature catara ct in its left eye. A biomicroscopic examination revealed numerous vacuolat ions in the posterior cortices with nucleus cataracts, covered by an intact anterior lens capsule. The changes observed by ocular sonographic examinat ion (OSG) of the left eye were hyperechoic, and a funnel-cone shape was obs erved posteriorly with cortex hyperechogenicity in the lens. The left eye w as diagnosed as having a posterior lenticonus with congenital cataract. Pha coemulsification was performed on the left eye as diagnostic treatment of t he posterior lenticonus and cataract. Postoperative OSG on the left eye rev ealed a V-shaped linear echo that was indicative of a posterior capsule of the lens. Moreover, it was confirmed that hyperechoic cataract material ins ide the lens had disappeared.