---
title: Corneal light reflex test (hirschberg test)
description: "The corneal light reflex, or Hirschberg test, is a simple way to screen for strabismus by observing where a light reflects on the corneas. It is especially useful in children. ## How it is performed The patient looks at a…"
url: "https://bluefinvision.com/knowledge-base/topics/diagnostics-testing/corneal-light-reflex-test-hirschberg-test/"
updated: "2025-12-17"
category: "Diagnostics & Testing"
---

# Corneal light reflex test (hirschberg test)

The corneal light reflex, or Hirschberg test, is a simple way to screen for strabismus by observing where a light reflects on the corneas. It is especially useful in children.

## How it is performed

The patient looks at a small light source.

- The examiner shines a penlight from in front and watches the reflection on each cornea
- In aligned eyes, reflections are centred and symmetric
- Displacement of the reflex suggests the direction and magnitude of deviation
- Can help distinguish true strabismus from pseudostrabismus due to facial features

## Role in practice

Findings guide further assessment.

- Abnormal results prompt more detailed cover testing and motility examination
- Quick, non-invasive, and easily used in primary care or screening settings
- Useful for monitoring large deviations over time
- Does not replace formal orthoptic evaluation when precise measurements are needed