The lacrimal system consists of structures that secrete tears and drain them. Tears are secreted by the lacrimal gland and drain through the lacrimal canaliculi and sac into the nasolacrimal duct. Obstructions in the nasolacrimal duct can be diagnosed using dye tests like fluorescein dye disappearance test and Jones tests I and II. Dacryocystography uses radioopaque dye to visualize the site of any blockages. Congenital nasolacrimal duct obstruction is common in infants and may require probing and irrigation. Dry eye can result from reduced tear production or altered tear film composition. Acute dacryocystitis involves acute inflammation of the lacri