Exophoria

Labelled Diagram of the Eye

Labelled diagram of the structure of the retina

Exophoria is a tendency to squint in such a way that one or both eyes tend to turn outwards (i.e. away from the nose) when covered.

 

It is useful to understand this term in the context of other related terms.

The following is a summary of words used to refer to squints and tendencies to squint:

Description of squint:

Name of Squint:

"Tendency to" (type of squint)

All forms - general term

Squint or
Strabismus or
Heterotropia

Heterophoria

Horizontal (Convergent)

Esotropia

Esophoria

Horizontal (Divergent)

Exotropia

Exophoria

Vertical (Upwards)

Hypertropia

-

Vertical (Downwards)

Hypotropia

-

Eyes twisted (clockwise or anti-clockwise) relative to each other,

Cyclotropia

Cyclophoria

Description of squint Name of Squint "Tendency to" (type of squint)

All forms - general term

Squint or
Strabismus or
Heterotropia
Heterophoria

Horizontal (Convergent)

Esotropia Esophoria

Horizontal (Divergent)

Exotropia Exophoria

Vertical (Upwards)

Hypertropia -

Vertical (Downwards)

Hypotropia -

Eyes twisted (clockwise or anti-clockwise) relative to each other,

Cyclotropia Cyclophoria

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

For further information see also our pages of books about ophthalmology.

The following books may also be of interest:

The Aging Eye (Harvard Medical School)
MCQ Companion to the Eye (Textbook)
The Secret of Perfect Vision: How You Can Prevent and Reverse Nearsightedness
What Your Doctor May Not Tell You About(TM) Glaucoma: The Essential Treatments and Advances That Could Save Your Sight

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