Influence of artificially generated interocular blur difference on fusion stability under vergence stress

DOSTÁLEK, Miroslav, Jan HEJDA, Karel FLIEGEL, Michaela DUCHÁČKOVÁ, Ladislav DUŠEK, Jiří HOZMAN, Tomáš LUKEŠ and Rudolf AUTRATA. Influence of artificially generated interocular blur difference on fusion stability under vergence stress. Journal of Eye Movement Research. INT GROUP EYE MOVEMENT RESEARCH, 2019, vol. 12, No 4, p. 1-15. ISSN 1995-8692. Available from: https://dx.doi.org/10.16910/jemr.12.4.4.

Basic information

• Original name: Influence of artificially generated interocular blur difference on fusion stability under vergence stress
• Authors: DOSTÁLEK, Miroslav (203 Czech Republic, guarantor, belonging to the institution), Jan HEJDA (203 Czech Republic), Karel FLIEGEL (203 Czech Republic), Michaela DUCHÁČKOVÁ (203 Czech Republic), Ladislav DUŠEK (203 Czech Republic, belonging to the institution), Jiří HOZMAN (203 Czech Republic), Tomáš LUKEŠ (203 Czech Republic) and Rudolf AUTRATA (203 Czech Republic, belonging to the institution).
• Edition: Journal of Eye Movement Research, INT GROUP EYE MOVEMENT RESEARCH, 2019, 1995-8692.

Other information

• Original language: English
• Type of outcome: Article in a journal
• Field of Study: 50302 Education, special
• Country of publisher: Switzerland
• Confidentiality degree: is not subject to a state or trade secret
• WWW: URL
• Impact factor: Impact factor: 1.404
• RIV identification code: RIV/00216224:14110/19:00110941
• Organization unit: Faculty of Medicine
• Doi: http://dx.doi.org/10.16910/jemr.12.4.4
• UT WoS: 000523260000004
• Keywords in English: binocular fusion effieciency; vergence demand; blur balance; blur conflict; suppression; binocular rivalry; signal strengh; natural image statistics
• Tags: 14110315, 14110615, 14119612, rivok
• Tags: International impact, Reviewed

Abstract

The stability of fusion was evaluated by its breakage when interocular blur differences were presented under vergence demand to healthy subjects. We presumed that these blur differences cause suppression of the more blurred image (interocular blur suppression, IOBS), disrupt binocular fusion and suppressed eye leaves its forced vergent position. During dichoptic presentation of static grayscale images of natural scenes, the luminance contrast (mode B) or higher-spatial frequency content (mode C) or luminance contrast plus higher-spatial frequency content (mode A) were stepwise reduced in the image presented to the non-dominant eye. We studied the effect of these types of blur on fusion stability at various levels of the vergence demand. During the divergence demand, the fusion was disrupted with approximately half blur than during convergence. Various modes of blur influenced fusion differently. The mode C (isolated reduction of higher-spatial frequency content) violated fusion under the lowest vergence demand significantly more than either isolated or combined reduction of luminance contrast (mode B and A). According to our results, the image´s details (i.e. higher-spatial frequency content) protects binocular fusion from disruption by the lowest vergence demand.