human eye anatomy. lacrimal glands, sac and ducts.

anatomy beautiful blue canal cornea cross-section diagram duct eps10 eye eye care tears eyeball eyelids eyesight gland health human illustration lacrimal meat sac look lower opening nasal passage macro medical medicine mouth nasolacrimal muscle nasal nasolacrimal ophthalmologist ophthalmology optical optometry producing pupil retina see structure tear drop vector vision