Microtopia

Microtropy (monofixation syndrome) may be primary or occur in the outcome of surgery after removal of a large deviation angle.

[1], [2], [3], [4], [5], [6], [7]

Symptoms of microtropism

1. Anisometropia occurs in almost 90 all cases, often accompanied by hypermetropia or hypermetropic astigmatism.
2. A very small deviation angle (8 D or less) can be detected (or not detected) in a cover test.
3. The central suppression scotoma on the deflected eye prevents the phenomenon of confusion and can be detected by:

• striped glasses Bagolinu. Observe the interruption of the oblique line in the figure of the cross at the intersection point, visible to the microtropical eye with the suppression scotoma.
• test with a prism 4D base outside
  • When a prism with a 4D base is placed outside the base of the eye before the normal eye, an unexpected displacement of the image from the fovea and a paraphoveal region occurs, the temporal side of the retina, which provokes the reflex movement.
  • There are no adjusting motions in the microtropic eye, since the image shift occurs within the limits of the expression scotoma.
  • In accordance with the law of Hering, the pair eye is deflected to the outside, when the eye under the prism is fixed, followed by fusional motion into the opposite watchman to correct the displacement of the image.
  • If the central scotoma affects the function of the fovea, then the installation motion does not occur.

4. Other signs: ASC, normal or almost normal amplitude of peripheral fusions and reduced stereoscopic vision.

Treatment of microtropy

Spot correction of anisometropia and occlusion is used to treat amblyopia, but restoration of bifovel fixation is almost impossible.