A nurse is performing the diagnostic positions test. The nurse recognizes that normal findings from the diagnostic positions test should be which of these results?

A) Lid lag when moving the eyes from a superior to an inferior position: This is incorrect. Lid lag refers to a delay in the movement of the eyelid as the eyes move downward. It is considered an abnormal finding and is often associated with conditions like hyperthyroidism (Graves' disease), where the eyelid does not follow the downward gaze appropriately. In the diagnostic positions test, normal eye movement should not include lid lag. B) Nystagmus when reading the Snellen chart: This is incorrect. Nystagmus is an involuntary, rhythmic oscillation of the eyes, which can be indicative of a neurological or vestibular issue. It is not a normal finding during the diagnostic positions test. Nystagmus may be seen with certain disorders, such as vestibular dysfunction, neurologic damage, or alcohol intoxication, but it should not occur as a normal response to eye movement during the diagnostic positions test. C) Parallel movement of both eyes: This is the correct answer. In a normal result of the diagnostic positions test, both eyes should move in parallel and remain aligned during all directions of gaze. The purpose of this test is to assess for any eye muscle weakness or cranial nerve dysfunction that might cause misalignment, such as strabismus or a disorder affecting the extraocular muscles. If both eyes track smoothly and simultaneously without deviation or lag, this is a normal and expected finding. D) Convergence of the eyes: This is incorrect. While convergence (the inward movement of both eyes toward the nose) is a normal response when focusing on a near object, it is not the specific goal of the diagnostic positions test. The diagnostic positions test is primarily concerned with assessing the ability of the eyes to move together in all directions of gaze without misalignment or abnormal movement. While convergence is a sign of normal eye function, it is not the primary focus of this particular test.