GROSS ANATOMY

Detailed explanation-1: -The lacrimal duct system transmits tears from the surface of the eye to the nasal cavity. Tears enter the duct system at the lacrimal punctae and conduct through canaliculi within the eyelids. The canaliculi drain into the lacrimal sac .

Detailed explanation-2: -The openings to the lacrimal drainage system are the superior and inferior puncta, located medially in the upper and lower eyelid, respectively. Tears travel through the puncta into the superior and inferior canaliculi, which join to form the common canaliculus.

Detailed explanation-3: -Lacrimal puncta: Lacrimal puncta are the openings that pump tears out of your eyes. You have a punctum (the singular form of puncta) in each of your upper and lower eyelids on the inside of your eye, near your nose. Every time you blink, your puncta act like valves that drain used tears away from your eye.

Detailed explanation-4: -Tears drain into openings, called puncta, on the inside corners of your upper and lower eyelids. The puncta lead to small canals called canaliculi. Canaliculi move tears to a sac to a reservoir on the side of the nose called the lacrimal sac. From there tears travel down the nasolacrimal duct and drain into your nose.

Detailed explanation-5: -Both the upper eyelid and the lower eyelid have a small opening on the surface of the eyelid margin near the medial canthus. These are called puncta. Each puncta leads to a drainage canal that eventually flows into the lacrimal sac and then the nasal cavity.