Target Properties Effects on Central versus Peripheral Vertical Fusion Interaction Tested on a 3D Platform

Di Zhang*, Pascaline Neveu, Yulia Fattakhova, Stéphanie Ferragut, Mathieu Lamard, Béatrice Cochener, Jean Louis de Bougrenet de la Tocnaye

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Purpose: We investigated the impact of target properties on vertical fusion amplitude (VFA) using a 3D display platform; the performance of the subjects allowed us to assess how central and peripheral retina regions interact during the fusion process. Material and Methods: Fourteen subjects were involved in the test. VFA was recorded by varying the viewing distance, target complexity, disparity velocity, lighting condition and background luminance. Base-up prisms were introduced to create vertical disparity in the peripheral retinal area, whereas an offset compensation was added in the central area. Data were analyzed in JMP software using T-test and repeated-measures ANOVA tests. Results: VFA is significantly affected by target properties including viewing distance, target complexity and disparity velocity; the impact from lighting condition and background luminance is not significant. Although central retina plays a crucial role in the fusion process, peripheral regions also affect the fusion performance when stimulus size on retina and contents disparity values are modified between central and peripheral vision. Conclusion: Vertical fusion is affected by various target properties. For the first time, peripheral vertical disparity direction effects on central fusion and eye motion response have been explored. Besides, a quantitative interaction of central and peripheral fusion is observed, which could be applied in clinical measurement on binocular disease concerning central and peripheral vision conflict.

Original languageEnglish
Pages (from-to)476-483
Number of pages8
JournalCurrent Eye Research
Issue number3
Publication statusPublished - 4 Mar 2017
Externally publishedYes


  • Central fusion
  • peripheral fusion
  • prisms
  • stereo vision
  • vergence
  • vertical disparity


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