Trochlear Nerve Disease, also known as Trochlear Nerve Palsy, is a medical condition that affects the fourth cranial nerve. This nerve plays a crucial role in controlling eye movements. When the trochlear nerve is damaged or impaired, various symptoms can arise, including double vision, difficulty moving the affected eye, and vertical misalignment of the eyes. This condition can be referred to using several synonyms, such as Trochlear Nerve Dysfunction, Fourth Cranial Nerve Disorder, or Trochlear Nerve Injury. Regardless of the term used, it is important for individuals experiencing these symptoms to seek medical attention promptly for an accurate diagnosis and appropriate treatment.