Absorption of Tear Fluid Components

Recent animal experiments have indicated that components of tear fluid are absorbed in the nasolacrimal passage and are transported into the surrounding cavernous body that is subject to autonomic control

Lacrimal Passage
Fig. 1.11. The normally constant absorption of tear fluid components into the blood vessels of the surrounding cavernous body of the nasolacrimal ducts and their transport to the lacrimal gland by blood vessel connections (1) could be a feedback signal for tear fluid production (2). (From [19])

and regulates tear outflow (Table 1.2) [13]. Under normal conditions tear fluid components are constantly absorbed into the blood vessels of the surrounding cavernous body. These vessels are connected to the blood vessels of the outer eye and could act as a feedback signal for tear fluid production (Fig. 1.11) [13, 19], which ceases if these tear components are not absorbed (see Chap. 2).

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Essentials of Human Physiology

Essentials of Human Physiology

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