Final answer:
Diagnosis of phoria might be simpler in cases where the condition is consistent and manifests as a tropia, which is a clearly observable misalignment of the eyes.
Step-by-step explanation:
Diagnosis of phoria, which refers to a latent deviation of the eyes that occurs when the eyes are not given a visual target to fixate on, might be simpler in cases where the condition is consistent and well defined, such as a tropia. A tropia is a manifest misalignment of the eyes that is always present, or present during a cover test when one eye is covered, making the deviation observable. In contrast, phorias are usually only detectable through specific tests that involve covering and uncovering the eyes or disrupting binocular vision in other ways. These tests can reveal the underlying tendency of the eye to deviate that is kept in check by binocular vision. Simple diagnoses might not always be applicable as phorias can fluctuate and may be influenced by factors like fatigue or illness.