Final answer:
Dacryoadenalgia is a condition that causes pain in the lacrimal gland involved in tear production, not related to visual disturbances, dental pain, or the adrenal glands.
Step-by-step explanation:
A true statement regarding dacryoadenalgia is that it is a tear gland disorder. Dacryoadenalgia specifically refers to pain in the lacrimal gland, which is a gland situated above the eye that secretes tears. This condition does not cause visual disturbances as a primary symptom, is not related to dental pain, and does not affect the adrenal glands. Disorders of the adrenal glands include issues like hypersecretion (e.g., Cushing's syndrome) or hyposecretion, but dacryoadenalgia concerns the lacrimal gland and associated structures involved in tear production and drainage, such as the lacrimal punctum and lacrimal sac.