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The lacrimal apparatus. Right side. Outline of bones of face, showing position of air sinuses. The nasolacrimal duct (also called the tear duct) carries tears from the lacrimal sac of the eye into the nasal cavity. [1][2] The duct begins in the eye socket between the maxillary and lacrimal bones, from where it passes downwards and backwards.
The lacrimal apparatus is the physiological system containing the orbital structures for tear production and drainage. [1] The lacrimal gland, which secretes the tears, and its excretory ducts, which convey the fluid to the surface of the eye; it is a j-shaped serous gland located in lacrimal fossa. The lacrimal canaliculi, the lacrimal sac ...
The accessory visual structures (or adnexa of eye, ocular adnexa, etc.) are the protecting and supporting structures (adnexa) of the eye, including the eyebrow, eyelids, and lacrimal apparatus. The eyebrows, eyelids, eyelashes, lacrimal gland and drainage apparatus all play a crucial role with regards to globe protection, lubrication, and ...
Anatomical terminology. [ edit on Wikidata] The lacrimal sac or lachrymal sac[ 1 ] is the upper dilated end of the nasolacrimal duct, [ 2 ] and is lodged in a deep groove formed by the lacrimal bone and frontal process of the maxilla. It connects the lacrimal canaliculi, which drain tears from the eye's surface, and the nasolacrimal duct, which ...
Diagram of eye with surrounding superior, oblique, medial and inferior rectus muscles; supraorbital foramen shown above the eye, and inferior orbital fissure inferolaterally. In anatomy, the orbit is the cavity or socket/hole of the skull in which the eye and its appendages are situated. "Orbit" can refer to the bony socket, [ 1 ] or it can ...
The human eye is a sensory organ in the visual system that reacts to visible light allowing eyesight. Other functions include maintaining the circadian rhythm, and keeping balance. Arizona Eye Model. "A" is accommodation in diopters. The eye can be considered as a living optical device. It is approximately spherical in shape, with its outer ...
Lacrimal bone is in yellow. The lacrimal bones are two small and fragile bones of the facial skeleton; they are roughly the size of the little fingernail and situated at the front part of the medial wall of the orbit. They each have two surfaces and four borders. Several bony landmarks of the lacrimal bones function in the process of lacrimation.
The lacrimal canaliculi are labelled as the lacrimal ducts. The lacrimal canaliculi (sg.: canaliculus) are the small channels in each eyelid that drain lacrimal fluid, from the lacrimal puncta to the lacrimal sac. This forms part of the lacrimal apparatus that drains lacrimal fluid from the surface of the eye to the nasal cavity.
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