Overestimation of stereo thresholds by the TNO stereotest is not due to global stereopsis
<h4>Purpose</h4> <p>It has been repeatedly shown that the TNO stereotest overestimates stereo threshold compared to other clinical stereotests. In the current study, we test whether this overestimation can be attributed to a distinction between ‘global’ (or ‘cyclopean’) and ‘local...
| Autors principals: | , , , , , |
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| Format: | Journal article |
| Idioma: | English |
| Publicat: |
Wiley
2017
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| _version_ | 1826283336637612032 |
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| author | Vancleef, K Read, J Herbert, W Goodship, N Woodhouse, M Serrano-Pedraza, I |
| author_facet | Vancleef, K Read, J Herbert, W Goodship, N Woodhouse, M Serrano-Pedraza, I |
| author_sort | Vancleef, K |
| collection | OXFORD |
| description | <h4>Purpose</h4> <p>It has been repeatedly shown that the TNO stereotest overestimates stereo threshold compared to other clinical stereotests. In the current study, we test whether this overestimation can be attributed to a distinction between ‘global’ (or ‘cyclopean’) and ‘local’ (feature or contour-based) stereopsis.</p> <h4>Methods</h4> <p>We compared stereo thresholds of a global (TNO) and a local clinical stereotest (Randot Circles). In addition, a global and a local psychophysical stereotest were added to the design. One hundred and forty-nine children between 4 and 16 years old were included in the study.</p> <h4>Results</h4> <p>Stereo threshold estimates with TNO were a factor of two higher than with any of the other stereotests. No significant differences were found between the other tests. Bland-Altman analyses also indicated low agreement between TNO and the other stereotests, especially for higher stereo threshold estimates. Simulations indicated that the TNO test protocol and test disparities can account for part of this effect.</p> <h4>Discussion</h4> <p>The results indicate that the global – local distinction is an unlikely explanation for the overestimated thresholds of TNO. Test protocol and disparities are one contributing factor. Potential additional factors include the nature of the task (TNO requires depth discrimination rather than detection) and the use of anaglyph red/green 3D glasses rather than polarizing filters, which may reduce binocular fusion.</p> |
| first_indexed | 2024-03-07T00:57:23Z |
| format | Journal article |
| id | oxford-uuid:888c459b-fbd6-4b1f-b55f-d84f8dc0a8a7 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T00:57:23Z |
| publishDate | 2017 |
| publisher | Wiley |
| record_format | dspace |
| spelling | oxford-uuid:888c459b-fbd6-4b1f-b55f-d84f8dc0a8a72022-03-26T22:18:05ZOverestimation of stereo thresholds by the TNO stereotest is not due to global stereopsisJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:888c459b-fbd6-4b1f-b55f-d84f8dc0a8a7EnglishSymplectic Elements at OxfordWiley2017Vancleef, KRead, JHerbert, WGoodship, NWoodhouse, MSerrano-Pedraza, I <h4>Purpose</h4> <p>It has been repeatedly shown that the TNO stereotest overestimates stereo threshold compared to other clinical stereotests. In the current study, we test whether this overestimation can be attributed to a distinction between ‘global’ (or ‘cyclopean’) and ‘local’ (feature or contour-based) stereopsis.</p> <h4>Methods</h4> <p>We compared stereo thresholds of a global (TNO) and a local clinical stereotest (Randot Circles). In addition, a global and a local psychophysical stereotest were added to the design. One hundred and forty-nine children between 4 and 16 years old were included in the study.</p> <h4>Results</h4> <p>Stereo threshold estimates with TNO were a factor of two higher than with any of the other stereotests. No significant differences were found between the other tests. Bland-Altman analyses also indicated low agreement between TNO and the other stereotests, especially for higher stereo threshold estimates. Simulations indicated that the TNO test protocol and test disparities can account for part of this effect.</p> <h4>Discussion</h4> <p>The results indicate that the global – local distinction is an unlikely explanation for the overestimated thresholds of TNO. Test protocol and disparities are one contributing factor. Potential additional factors include the nature of the task (TNO requires depth discrimination rather than detection) and the use of anaglyph red/green 3D glasses rather than polarizing filters, which may reduce binocular fusion.</p> |
| spellingShingle | Vancleef, K Read, J Herbert, W Goodship, N Woodhouse, M Serrano-Pedraza, I Overestimation of stereo thresholds by the TNO stereotest is not due to global stereopsis |
| title | Overestimation of stereo thresholds by the TNO stereotest is not due to global stereopsis |
| title_full | Overestimation of stereo thresholds by the TNO stereotest is not due to global stereopsis |
| title_fullStr | Overestimation of stereo thresholds by the TNO stereotest is not due to global stereopsis |
| title_full_unstemmed | Overestimation of stereo thresholds by the TNO stereotest is not due to global stereopsis |
| title_short | Overestimation of stereo thresholds by the TNO stereotest is not due to global stereopsis |
| title_sort | overestimation of stereo thresholds by the tno stereotest is not due to global stereopsis |
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