Unit 5: Children & Squint

If the visual axis is convergent (eye turned in) this is termed an ESO deviation (i.e. esophoria or esotropia)

Image shows a left esotropia.

child with left esotropia

Source: EyeRounds.org.

Contributor: William Charles Caccamise, Sr, MD, Retired Clinical Assistant Professor of Ophthalmology, University of Rochester School of Medicine and Dentistry.


If the visual axis is divergent this is termed an EXO deviation (i.e. exotropia or exophoria)

Image shows  left exotropia

boy with left exotropia

Source: EyeRounds.org.

Contributor: William Charles Caccamise, Sr, MD, Retired Clinical Assistant Professor of Ophthalmology, University of Rochester School of Medicine and Dentistry.


If the visual axis is higher (eye turned upwards) this is termed an hypertropia.
Image shows left hypertropia.
Man with left hypertropia

Source: EyeRounds.org.

Contributor: Rahul Bhola, MD, University of Iowa.