Effects of monocular blur on clinical measurements of stereopsis and binocular contrast sensitivity
Visual conditions such as anisometropia, monovision and monocular undercorrection affect the combination of visual input from both eyes. This study investigated the effects of monocular blur, in binocularly normal participants, on stereoacuity and binocular contrast sensitivity. Fifteen young adults...
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| Format: | Article |
| Language: | English |
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Penerbit Universiti Kebangsaan Malaysia
2017
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| Online Access: | http://journalarticle.ukm.my/11454/ http://journalarticle.ukm.my/11454/1/16733-47092-1-SM.pdf |
| _version_ | 1848812731468087296 |
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| author | Mohd ‘Izzuddin Hairol, Loshane Arusulem, Wong, Jia Ying |
| author_facet | Mohd ‘Izzuddin Hairol, Loshane Arusulem, Wong, Jia Ying |
| author_sort | Mohd ‘Izzuddin Hairol, |
| building | UKM Institutional Repository |
| collection | Online Access |
| description | Visual conditions such as anisometropia, monovision and monocular undercorrection affect the combination of visual input from both eyes. This study investigated the effects of monocular blur, in binocularly normal participants, on stereoacuity and binocular contrast sensitivity. Fifteen young adults (age range between 19 and 23 years old) with normal visual acuity and binocular vision participated in this study. Stereopsis was measured using the TNO test with a series of positive spherical lenses placed before the dominant eye. The procedure was repeated using the Titmus Stereotest on five participants as a control experiment. Monocular and binocular contrast sensitivities were also measured using the Pelli-Robson Contrast Sensitivity Chart. Blur was induced monocularly with a series of positive spherical lenses placed before the dominant eye and binocular contrast sensitivity was re-measured. Stereopsis scores decreased significantly when monocular blur was imposed. Across blur levels, absolute stereopsis scores measured with TNO test were worse than those measured with Titmus stereotest (all p < 0.05). However, the ratio of scores obtained without blur and under monocular blur appeared to be similar for both tests. Stereopsis without blur was between 6.82× to 8× better than that obtained with the highest level of imposed monocular blur. Binocular contrast sensitivity score decreased significantly with increasing level of monocular blur (p < 0.01). Binocular contrast sensitivity score without blur was 1.62× better than that obtained under binocular viewing with highest level of imposed blur. Stereopsis tests are more sensitive than measurements of binocular contrast sensitivity as an indicator of interocular acuity discrepancies which could occur in anisometropic or monovision patients. However, the choice of stereopsis test is crucial, as the TNO test appears to be more sensitive to monocular blur than the Titmus stereostest. |
| first_indexed | 2025-11-15T00:06:57Z |
| format | Article |
| id | oai:generic.eprints.org:11454 |
| institution | Universiti Kebangasaan Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T00:06:57Z |
| publishDate | 2017 |
| publisher | Penerbit Universiti Kebangsaan Malaysia |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | oai:generic.eprints.org:114542018-03-16T00:49:42Z http://journalarticle.ukm.my/11454/ Effects of monocular blur on clinical measurements of stereopsis and binocular contrast sensitivity Mohd ‘Izzuddin Hairol, Loshane Arusulem, Wong, Jia Ying Visual conditions such as anisometropia, monovision and monocular undercorrection affect the combination of visual input from both eyes. This study investigated the effects of monocular blur, in binocularly normal participants, on stereoacuity and binocular contrast sensitivity. Fifteen young adults (age range between 19 and 23 years old) with normal visual acuity and binocular vision participated in this study. Stereopsis was measured using the TNO test with a series of positive spherical lenses placed before the dominant eye. The procedure was repeated using the Titmus Stereotest on five participants as a control experiment. Monocular and binocular contrast sensitivities were also measured using the Pelli-Robson Contrast Sensitivity Chart. Blur was induced monocularly with a series of positive spherical lenses placed before the dominant eye and binocular contrast sensitivity was re-measured. Stereopsis scores decreased significantly when monocular blur was imposed. Across blur levels, absolute stereopsis scores measured with TNO test were worse than those measured with Titmus stereotest (all p < 0.05). However, the ratio of scores obtained without blur and under monocular blur appeared to be similar for both tests. Stereopsis without blur was between 6.82× to 8× better than that obtained with the highest level of imposed monocular blur. Binocular contrast sensitivity score decreased significantly with increasing level of monocular blur (p < 0.01). Binocular contrast sensitivity score without blur was 1.62× better than that obtained under binocular viewing with highest level of imposed blur. Stereopsis tests are more sensitive than measurements of binocular contrast sensitivity as an indicator of interocular acuity discrepancies which could occur in anisometropic or monovision patients. However, the choice of stereopsis test is crucial, as the TNO test appears to be more sensitive to monocular blur than the Titmus stereostest. Penerbit Universiti Kebangsaan Malaysia 2017 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/11454/1/16733-47092-1-SM.pdf Mohd ‘Izzuddin Hairol, and Loshane Arusulem, and Wong, Jia Ying (2017) Effects of monocular blur on clinical measurements of stereopsis and binocular contrast sensitivity. Jurnal Sains Kesihatan Malaysia, 15 (1). pp. 19-25. ISSN 1675-8161 http://ejournal.ukm.my/jskm/issue/view/635 |
| spellingShingle | Mohd ‘Izzuddin Hairol, Loshane Arusulem, Wong, Jia Ying Effects of monocular blur on clinical measurements of stereopsis and binocular contrast sensitivity |
| title | Effects of monocular blur on clinical measurements of stereopsis and binocular contrast sensitivity |
| title_full | Effects of monocular blur on clinical measurements of stereopsis and binocular contrast sensitivity |
| title_fullStr | Effects of monocular blur on clinical measurements of stereopsis and binocular contrast sensitivity |
| title_full_unstemmed | Effects of monocular blur on clinical measurements of stereopsis and binocular contrast sensitivity |
| title_short | Effects of monocular blur on clinical measurements of stereopsis and binocular contrast sensitivity |
| title_sort | effects of monocular blur on clinical measurements of stereopsis and binocular contrast sensitivity |
| url | http://journalarticle.ukm.my/11454/ http://journalarticle.ukm.my/11454/ http://journalarticle.ukm.my/11454/1/16733-47092-1-SM.pdf |