Heterotropia is an abnormal alignment of the eyes. It can take various forms, the most common being horizontal.
Examples of forms of heterotropia include:
- Horizontal: Convergent Strabismus (also called Esotropia)
- Horizontal: Divergent Strabismus (also called Exotropia)
- Vertical: Hypertropia (an eye looks upwards)
- Vertical: Hypotropia (an eye looks downwards)
- Eyes twisted clockwise or anticlockwise relative to each other: Cyclotropia.
Squints can also be classified according to:
- Abnormal alignment of eyes is the same, or very similar, wherever (in their visual field) the person is looking / gazing (concomitant), or the
- Abnormal alignment of eyes varies depending on where (in their visual field) the person is looking / gazing (incomitant).
More about Ophthalmology:
This section includes short definitions
of many diseases, disorders, and conditions of the eyes and visual system.
For definitions of other terms in this category, choose from the list to the left (but note that this is not a complete/exhaustive list).
Other related pages include
- A diagram of the eye
- Definitions and descriptions of the parts of the eye
- A concise description of the human retina
- Definitions of parts of the retina
- Clinical and surgical procedures re. eyes and human visual system
For further information see also our pages of books about ophthalmology.