Which ocular condition is associated with feline calicivirus?

Feline calicivirus is primarily known for causing various clinical signs in cats, particularly affecting the respiratory and oral systems. One of the hallmark presentations of this viral infection is conjunctivitis accompanied by oral ulceration. This association arises because the virus can lead to inflammatory responses in both the conjunctiva of the eyes and the oral mucosa, which results in ulcerative lesions.

In cats infected with feline calicivirus, conjunctivitis manifests as redness, swelling, and discharge from the eyes, often coupled with painful oral lesions that can cause difficulty in eating and drinking. The oral ulceration seen in these cats is a significant aspect of the disease and helps in the diagnosis, linking ocular symptoms directly to the systemic effects of the virus.

The other conditions listed, while they may present in feline patients, do not have the direct association with feline calicivirus and therefore, are not correct answers. The focus on conjunctivitis paired with oral ulceration is a key diagnostic criterion for feline calicivirus infection, making this choice the most appropriate.