Pseudostrabismus

Photo courtesy of Children's Eye Institute. [Attn: Non-MDH Link]

Note that in the above picture, the child’s left eye appears to turn in towards her nose. However, when a pen light is pointed towards her eyes and the reflection is observed (called the Corneal Light Reflex test), the light reflections are actually symmetrical. Her eye appears to turn in due to the skin crease (called the epicanthal fold) in her left. Her are eyes are not turned, but are normal.

Strabismus

Photo courtesy of Children's Eye Institute. [Attn: Non-MDH Link]

Notice how the corneal reflex in the right eye is located at the center of the eye, but is found towards the outside of the left eye, indicating strabismus.