What is a likely diagnosis for a 30-year-old female presenting with double vision and difficulty swallowing, but is otherwise healthy?

Myasthenia Gravis is a likely diagnosis in this scenario due to the specific symptoms of double vision (diplopia) and difficulty swallowing (dysphagia). Myasthenia Gravis is an autoimmune disorder that affects the communication between nerves and muscles, leading to weakness in voluntary muscle groups. The symptoms tend to fluctuate and worsen with activity, which correlates with the muscle fatigue experienced in this condition. The involvement of ocular muscles often results in double vision, and weakness in the muscles responsible for swallowing can lead to dysphagia.

While Multiple Sclerosis can present with similar symptoms, it typically involves neurological deficits that extend beyond just eye and throat issues, manifesting in more complex ways due to demyelination of central nervous system pathways. Guillain-Barré Syndrome is characterized by rapid onset of muscle weakness starting in the lower extremities and is often preceded by an infection; it does not commonly cause isolated double vision and difficulty swallowing at the onset. Ocular migraines can cause transient visual disturbances, but they do not usually present with swallowing difficulties and are typically not associated with muscle weakness.

Taking these points into consideration, the presence of both double vision and swallowing difficulties in an otherwise healthy 30-year-old female aligns closely with the characteristics