Which of the following is NOT one of the main ocular findings associated with Graves' ophthalmopathy?

Graves' ophthalmopathy, also known as thyroid eye disease, is characterized by specific ocular findings associated with the autoimmune thyroid dysfunction common in Graves' disease. Among these findings, upper lid retraction and proptosis (or exophthalmos) are commonly observed. Upper lid retraction occurs due to the overactivity of the levator palpebrae muscle, while proptosis results from the enlargement of the extraocular muscles and orbital fat due to inflammation.

Superior limbic keratoconjunctivitis can also occur in patients with Graves' ophthalmopathy, often due to the exposure of the cornea from eyelid retraction and decreased blink reflexes.

A forced duction test assesses the mobility of the eye and is performed to evaluate for restrictions in eye movement, typically due to muscle entrapment. In the case of Graves' ophthalmopathy, the forced duction test would often be negative, indicating that the extraocular muscles are unrestricted in their movement, which is consistent with the condition. Therefore, the presence of a negative result on a forced duction test does not align with the main ocular findings typically associated with this condition.

Consequently, the choice indicating a negative forced duction test is indeed not a main ocular