<prompt> For congenital obstruction of nasolacrimal duct, probing is done at what age?2 months6 months10 months14 months  <response>: Probing of congenital nasolacrimal duct blockade with bowmans Probe It should be performed, in case the condition is not cured by the age of 3-4 months. Some surgeons prefer to wait till the age of 6 months. It is usually performed under general anaesthesia. While performing probing, care must be taken not to injure the canaliculus. Ref: Khurana 7the p.410 