**Core Concept**
The Hirschberg test is a clinical assessment tool used to evaluate the alignment of the eyes in patients with strabismus or other ocular misalignment disorders. It involves shining a light into the patient's eyes and observing the reflection to determine if the eyes are properly aligned.

**Why the Correct Answer is Right**
The Hirschberg test relies on the principle that when the eyes are properly aligned, the reflection of the light from the pupil is symmetrical and equidistant from the pupillary margin. This is because the light is being reflected off the center of the pupil, which is located at the center of the iris. The test is often performed in conjunction with the cover-uncover test to evaluate the presence of strabismus. In patients with strabismus, the reflection of the light may be asymmetrical or displaced due to the misalignment of the eyes.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the Hirschberg test is specifically used to evaluate the alignment of the eyes, not the movement of the eyes.
**Option B:** This option is incorrect because the cover-uncover test is a separate clinical assessment tool used to evaluate the presence of strabismus, not the Hirschberg test.
**Option C:** This option is incorrect because the corneal reflex test is a different clinical assessment tool used to evaluate the presence of a corneal abrasion or other corneal abnormalities.

**Clinical Pearl / High-Yield Fact**
The Hirschberg test is a simple and non-invasive way to evaluate the alignment of the eyes and can be performed in a variety of clinical settings, including primary care and emergency medicine.

**Correct Answer: C. Corneal reflex test.**