Optical Coherence Tomography in Children With Microtropia

J Pediatr Ophthalmol Strabismus. 2018 May 1;55(3):171-177. doi: 10.3928/01913913-20171026-01. Epub 2018 Jan 31.


Purpose: To assess whether optical coherence tomography (OCT) could be useful for detecting and documenting fixation in patients with microtropia.

Methods: Retinal fixation observation was performed using spectral-domain OCT on amblyopic children with microtropia. The position between the retinal fixation point and the anatomical fovea was measured, in microns, using the system software tools. Only patients with a high level of cooperation, OCT scan quality signal of 7 or better, and visual acuity of 0.70 logarithm of the minimum angle of resolution (logMAR) or worse in the amblyopic eye were included.

Results: A total of 25 patients were included: 15 with microtropia (study group) and 10 without tropia and with foveal fixation and stereopsis (control group). In the study group, microtropia was previously diagnosed in 67% of cases through the cover test, and was predominantly in the left eye (73%). The average visual acuity of the sound eye was 0.03 decimal and 0.18 logMAR in the amblyopic eye. The microtropia was 3.73 ± 3.34 prism diopters and eccentric fixation (387 ± 199 µm) with OCT was observed in all cases except one. Eccentricity was predominantly in the superonasal quadrant (57%). Both eyes in the control group and the contralateral eyes of the study group showed foveal fixation.

Conclusions: OCT can play an important role in the diagnosis and measurement of eccentric fixation in eyes with microtropia, providing high sensitivity. [J Pediatr Ophthalmol Strabismus. 2018;55(3):171-177.].

MeSH terms

  • Amblyopia / diagnosis*
  • Amblyopia / physiopathology
  • Child
  • Depth Perception / physiology*
  • Female
  • Fixation, Ocular / physiology*
  • Fovea Centralis / pathology*
  • Humans
  • Male
  • Strabismus / diagnosis*
  • Strabismus / physiopathology
  • Tomography, Optical Coherence / methods*
  • Visual Acuity*