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ID 117309
Author
Fujikado, Takashi Osaka University
Kitora, Akiko Tokushima University
Okamoto, Satoe Tokushima University
Iwata, Akiko Tokushima University
Ogushi, Yoko Tokushima University
Keywords
anisometropia
dynamic stereopsis
stereopsis
three-rods test
Content Type
Journal Article
Description
Purpose: We aimed to compare the depth perception under a microscope between binocular and monocular conditions using a newly developed microscopic stereotest (M-stereotest) and examine the effect of anisometropia on depth perception under a microscope.
Subjects and Methods: Thirty young and healthy subjects were examined. A manipulator attached with a stainless wire was placed under the objective lens of a stereomicroscope. The wire was moved up manually, and the subjects were instructed to stop the knob movement once the wire reached the same height as the fixed two wires. The deviation from the height of the fixed wires was measured under a best optically corrected binocular, a best optically corrected monocular, or an anisometropic binocular [± 3 diopters (D) in the dominant or nondominant eye] condition.
Results: The deviation was significantly smaller in the binocular condition than in the monocular dominant eye condition (0.38 ± 0.26 mm vs 1.89 ± 1.15 mm, p < 0.001) and was also significantly smaller in the best optically corrected binocular than in the anisometropic binocular condition [1.07 ± 1.00 mm (− 3.0 D), p = 0.003; 0.85 ± 0.67 mm (+3.0 D), p < 0.001].
Conclusion: Depth perception under the microscope is more accurate under the binocular than in the monocular condition, indicating the potential role of stereopsis. Anisometropia deteriorates depth perception, suggesting that refractive error should be corrected during microscopic work, such as during ophthalmic surgery.
Journal Title
Clinical Ophthalmology
ISSN
11775483
NCID
AA12240029
Publisher
Dove Medical Press
Volume
15
Start Page
3901
End Page
3908
Published Date
2021-09-22
Rights
This work is published and licensed by Dove Medical Press Limited. The full terms of this license are available at https://www.dovepress.com/terms.php and incorporate the Creative Commons Attribution – Non Commercial (unported, v3.0) License (http://creativecommons.org/licenses/by-nc/3.0/). By accessing the work you hereby accept the Terms. Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed. For permission for commercial use of this work, please see paragraphs 4.2 and 5 of our Terms (https://www.dovepress.com/terms.php).
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language
eng
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departments
Medical Sciences
University Hospital