Comparison of the Accuracy of Intraocular Pressure Measurement by Goldmann Applanation Tonometer and Keeler Noncontact Tonometer
Background and Objectives: Glaucoma is one of the leading causes of blindness, and its major risk factor is elevated intraocular pressure. Intraocular pressure measurement is a major examination in patients with glaucoma for diagnosis and treatment follow-up. This study was carried out with the purp...
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| Format: | Article |
| Language: | fas |
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Qom University of Medical Sciences
2013-07-01
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| Series: | Majallah-i Dānishgāh-i ̒Ulūm-i Pizishkī-i Qum |
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| Online Access: | http://journal.muq.ac.ir/index.php/qumsj/article/view/664 |
| _version_ | 1811300599475470336 |
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| author | Noushin Bazzazi Siamak Akbarzadeh Saadat Torabian Masoumeh Taghizadeh |
| author_facet | Noushin Bazzazi Siamak Akbarzadeh Saadat Torabian Masoumeh Taghizadeh |
| author_sort | Noushin Bazzazi |
| collection | DOAJ |
| description | Background and Objectives: Glaucoma is one of the leading causes of blindness, and its major risk factor is elevated intraocular pressure. Intraocular pressure measurement is a major examination in patients with glaucoma for diagnosis and treatment follow-up. This study was carried out with the purpose of comparing the accuracy of two types of conventional tonometers for measuring intraocular pressure.Methods: In this descriptive cross-sectional study, after complete ophthalmologic examinations, intraocular pressure was measured in 142 patients (284 eyes), two times at 5-minute intervals using both Goldmann and Keeler tonometers. The obtained results were analyzed with paired t-test and Pearson’s correlation test.Results: Mean intraocular pressure in subjects that were in normal pressure range (<21mmHg) was obtained 14.03±2.35mmHg with Goldmann tonometer, and 14.28±3.05mmHg with Keeler tonometer. The mean difference of the two methods was 0.25±0.70 (p=0.015) and the correlation coefficient between two methods was calculated 0.83 (p<0.0001). Mean intraocular pressure in high intraocular pressure range (³21mmHg) was obtained 26.16±5.1mmHg with Goldmann tonometer, and 26.92±5.58mmHg with Keeler tonometer. The mean difference of the two methods was 0.76±0.44 (p=0.003), and correlation coefficient between two methods was calculated 0.97 (p<0.0001). Conclusion: Based on the results of this study, both used tonometry methods had acceptable accuracy in normal intraocular pressure range, but in high-risk cases such as glaucoma, Goldmann applanation tonometer is preferred as the gold standard. |
| first_indexed | 2024-04-13T06:54:39Z |
| format | Article |
| id | doaj.art-f6ee1c52594c41b19687bf49fdf8ddd0 |
| institution | Directory Open Access Journal |
| issn | 1735-7799 2008-1375 |
| language | fas |
| last_indexed | 2024-04-13T06:54:39Z |
| publishDate | 2013-07-01 |
| publisher | Qom University of Medical Sciences |
| record_format | Article |
| series | Majallah-i Dānishgāh-i ̒Ulūm-i Pizishkī-i Qum |
| spelling | doaj.art-f6ee1c52594c41b19687bf49fdf8ddd02022-12-22T02:57:18ZfasQom University of Medical SciencesMajallah-i Dānishgāh-i ̒Ulūm-i Pizishkī-i Qum1735-77992008-13752013-07-01733542Comparison of the Accuracy of Intraocular Pressure Measurement by Goldmann Applanation Tonometer and Keeler Noncontact TonometerNoushin BazzaziSiamak AkbarzadehSaadat TorabianMasoumeh TaghizadehBackground and Objectives: Glaucoma is one of the leading causes of blindness, and its major risk factor is elevated intraocular pressure. Intraocular pressure measurement is a major examination in patients with glaucoma for diagnosis and treatment follow-up. This study was carried out with the purpose of comparing the accuracy of two types of conventional tonometers for measuring intraocular pressure.Methods: In this descriptive cross-sectional study, after complete ophthalmologic examinations, intraocular pressure was measured in 142 patients (284 eyes), two times at 5-minute intervals using both Goldmann and Keeler tonometers. The obtained results were analyzed with paired t-test and Pearson’s correlation test.Results: Mean intraocular pressure in subjects that were in normal pressure range (<21mmHg) was obtained 14.03±2.35mmHg with Goldmann tonometer, and 14.28±3.05mmHg with Keeler tonometer. The mean difference of the two methods was 0.25±0.70 (p=0.015) and the correlation coefficient between two methods was calculated 0.83 (p<0.0001). Mean intraocular pressure in high intraocular pressure range (³21mmHg) was obtained 26.16±5.1mmHg with Goldmann tonometer, and 26.92±5.58mmHg with Keeler tonometer. The mean difference of the two methods was 0.76±0.44 (p=0.003), and correlation coefficient between two methods was calculated 0.97 (p<0.0001). Conclusion: Based on the results of this study, both used tonometry methods had acceptable accuracy in normal intraocular pressure range, but in high-risk cases such as glaucoma, Goldmann applanation tonometer is preferred as the gold standard.http://journal.muq.ac.ir/index.php/qumsj/article/view/664GlaucomaTonometryIntraocular Pressure |
| spellingShingle | Noushin Bazzazi Siamak Akbarzadeh Saadat Torabian Masoumeh Taghizadeh Comparison of the Accuracy of Intraocular Pressure Measurement by Goldmann Applanation Tonometer and Keeler Noncontact Tonometer Majallah-i Dānishgāh-i ̒Ulūm-i Pizishkī-i Qum Glaucoma Tonometry Intraocular Pressure |
| title | Comparison of the Accuracy of Intraocular Pressure Measurement by Goldmann Applanation Tonometer and Keeler Noncontact Tonometer |
| title_full | Comparison of the Accuracy of Intraocular Pressure Measurement by Goldmann Applanation Tonometer and Keeler Noncontact Tonometer |
| title_fullStr | Comparison of the Accuracy of Intraocular Pressure Measurement by Goldmann Applanation Tonometer and Keeler Noncontact Tonometer |
| title_full_unstemmed | Comparison of the Accuracy of Intraocular Pressure Measurement by Goldmann Applanation Tonometer and Keeler Noncontact Tonometer |
| title_short | Comparison of the Accuracy of Intraocular Pressure Measurement by Goldmann Applanation Tonometer and Keeler Noncontact Tonometer |
| title_sort | comparison of the accuracy of intraocular pressure measurement by goldmann applanation tonometer and keeler noncontact tonometer |
| topic | Glaucoma Tonometry Intraocular Pressure |
| url | http://journal.muq.ac.ir/index.php/qumsj/article/view/664 |
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