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Pathogenesis of ocular tuberculosis: new

What is the pathophysiology of ocular tuberculosis?
PATHOPHYSIOLOGY/DEFINITION
Ocular involvement from TB can either occur as a primary active infection or a secondary infection from a distant site, usually through hematogenous spread.
The conjunctiva, cornea, and sclera are sites of primary ocular involvement.
What is the pathogenesis of tuberculosis NCBI?
Transmission of TB is by inhalation of infectious droplet nuclei containing viable bacilli (aerosol spread).
Mycobacteria-laden droplet nuclei are formed when a patient with active pulmonary TB coughs and can remain suspended in the air for several hours.
Sneezing or singing may also expel bacilli.
What is the cause of ocular tuberculosis?
Etiology
Direct ocular infection from an exogenous source, e.g., contact with the lids or conjunctiva (primary ocular TB).Hematogenous spread of M. tuberculosis from a pulmonary focus or extrapulmonary site (secondary ocular TB).Hypersensitivity reaction in structures of the eye after exposure to TB antigens.
Ocular tuberculosis (TB) is frequently considered as intraocular inflammation in the setting of latent TB, owing mainly to the absence of microbiological evidence of Mycobacterium tuberculosis in ocular fluid samples.

What is the pathophysiology of ocular tuberculosis?