# EOM & Eye Reflex Tests --- **EOM** or **extraocular movement muscles** tests and **eye reflex tests** test various other aspects of the [[eyes]] that don't directly relate to visual acuity. For tests determining visual acuity see: [[visual acuity tests]]. ## Corneal Light Reflex/Hirschberg Test The **corneal light reflex** test or the **Hirschberg test** assess the parallel alignment of the eye axes by shining a light towards a person's eyes and looking at the place where the light reflects off the corneas. 1) Ask the person to stare straight ahead. 2) Hold the light about 30 cm (12 inches) away. 3) Gently bright the light in towards their eye 4) Observe where the reflection of the light is on the cornea. They should be in the same spot. ## Diagnostic Positions Test/EOM Test The **diagnostic positions tests** tests the extraocular movement (EOM) muscles. 1) Ask the person to look straight ahead 2) Ask them to follow something (your finger, a light, a pencil/pen) with just their eyes. 3) Move the thing through the **six cardinal movements** of the gaze. ## Pupillary Light Reflex Test The **pupillary light reflex test** tests to see if both pupils contract at the same rate when exposed to light. 1) Darken the room and ask the person to gaze into the distance. This dialtes the pupils. 2) Advance a light in from the side and note response. 3) Measure (in mm) before and after the light reflex. If the pupils constrict simultaniously, that is called **consensual** light reflex. ## The Accommodation Reflex The **accommodation reflex test** tests how well the eyes can coordinate changes in vergance, lens shape (accommodation) and pupil size. 1) Ask the patient to focus on a distance object 2) Bring that object towards the face. 3) Observe reaction. Normal reactiosn are that both pupils should constrict, then dialate again when distant gaze is resumed. ___