Which of the following is a known ocular manifestation of Syphilis?

All of the listed conditions are associated with ocular manifestations of Syphilis, making it correct to select that all are known manifestations.

Interstitial keratitis is an inflammation of the cornea that is commonly seen in patients with congenital syphilis. It presents with corneal clouding and neovascularization, significantly affecting vision.

The salt and pepper fundus refers to a particular appearance of the retina that can occur in syphilis, characterized by a mottled pigmentation pattern in the fundus. This finding is indicative of retinal involvement in the disease and helps in the diagnostic process.

The Argyll Robertson pupil is also associated with syphilis, particularly in cases of neurosyphilis. It is characterized by pupils that are small and irregular, which do not constrict to light but do constrict during accommodation, reflecting an issue with the midbrain pathways rather than just the optic nerve.

Since each of these manifestations—interstitial keratitis, salt and pepper fundus, and Argyll Robertson pupil—are recognized signs associated with syphilis, this supports the conclusion that all are indeed ocular manifestations related to this infection.