exophoria


Also found in: Acronyms, Encyclopedia, Wikipedia.

exophoria

 [ek″so-for´e-ah]
heterophoria in which there is deviation of the visual axis of an eye away from that of the other eye in the absence of visual fusional stimuli. adj., adj exopho´ric.

ex·o·pho·ri·a

(ek'so-fō'rē-ă), Do not confuse this word with esophoria.
Tendency of the eyes to deviate outward when fusion is suspended.
Synonym(s): exodeviation (1)
[exo- + G. phora, a carrying]

ex·o·pho·ri·a

(eks'ō-fōr'ē-ă)
Tendency of the eyes to deviate outward when fusion is suspended.
Synonym(s): exodeviation (1) .
[exo- + G. phora, a carrying]

exophoria

A latent tendency for the eyes to turn outwards (diverge), but which is usually controlled by the binocular fusion power. If one eye is covered in exophoria it will turn outwards under the cover. Compare EXOTROPIA, ESOPHORIA.

exophoria (X, XOP, exo)

Turning of the eye outward from the active position when fusion is suspended. If symptomatic, treatment may be by means of base-in prisms, minus spherical lenses or visual training (Fig. E6). See convergence insufficiency; divergence excess.
Fig. E6 Prismatic correction of exophoriaenlarge picture
Fig. E6 Prismatic correction of exophoria
References in periodicals archive ?
There was no significant change in the horizontal near phoria value (t (11) = 0.49; p = 0.62), which ranged from 14 exophoria to 1 esophoria in the group.
Successful outcome was defined as alignment [less than or equal to] 10 PD esophoria or exophoria at the last follow-up.
They were found to have a 48% prevalence of a BV disorder, with the most common (48%) being an accommodative lag of ID or more, and the second most common (31%) being pseudo-convergence insufficiency--increased near exophoria and/or reduced base-out fusionai reserves at near in presence of accommodative lag of +0.75D or more.
In this sense, the CITT group developed a classification scheme for CI based on the following signs: exophoria at near vision greater than distance, [greater than or equal to] 4 prismatic diopters ([DELTA]), receded NPC, and reduced PFV range [28].
We would all agree that remote convergence, poor fusion ranges, large near exophorias and more severe symptoms are problems that need treating--and that treatment can be very effective--but where is your personal limit?
AC/A = accommodative convergence-to-accommodation, eso = esophoria, exo = exophoria, Hyper = hyperphoria, NA = not applicable, NRA = negative relative accommodation, Ortho = orthophoria, PD = prism diopter, PRA = positive relative accommodation, SD = standard deviation, SEM = standard error of the mean.
For example, an exophoria with a V pattern is smaller in downgaze, so elevating the chin can achieve the same effect.
For example, a clay target shooter with divergence excess (decompensated distance exophoria) in the right eye would tend to miss to the right of the clay (too much lead when going from left to right) if this were his dominant eye and he shoots off his right shoulder.
A high prevalence of reduced VA, reduced accommodation and exophoria and exOtropia are also commonly reported.
Man, aged 74 RE +0.75 -0.75 110 6/9- LE +1.75 -0.50 95 6/6+ DV CT 3[DELTA] R/L 2[DELTA] exophoria NV CT 6[DELTA] R/L 8[DELTA] exophoria Near vertical fusional reserve x/6/4 Intermittent diplopia for a few weeks, covers one eye to read [01] Which of the following statements is CORRECT regarding the test being performed in Image A?
Positive fusional amplitudes may be improved by practicing the prism base out range, whereby the patient slowly increases the base out prism strength, while maintaining binocular single vision on a distance (distance decompensating exophoria) or near (near decompensating exophoria) target.