Accuracy of axial length measurements from immersion B-scan ultrasonography in highly myopic eyes
<b>AIM:</b>To evaluate the accuracy of axial length (AL) measurements obtained from immersion B-scan ultrasonography (immersion B-scan) for intraocular lens (IOL) power calculation in patients with high myopia and cataracts.<b>METHODS:</b>Immersion B-scan, contact A-scan ultr...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Press of International Journal of Ophthalmology (IJO PRESS)
2014-06-01
|
| Series: | International Journal of Ophthalmology |
| Subjects: | |
| Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4067656/ |
| _version_ | 1818304613669928960 |
|---|---|
| author | Qing-Hua Yang Bing Chen Guang-Hua Peng Zhao-Hui Li Yi-Fei Huang |
| author_facet | Qing-Hua Yang Bing Chen Guang-Hua Peng Zhao-Hui Li Yi-Fei Huang |
| author_sort | Qing-Hua Yang |
| collection | DOAJ |
| description | <b>AIM:</b>To evaluate the accuracy of axial length (AL) measurements obtained from immersion B-scan ultrasonography (immersion B-scan) for intraocular lens (IOL) power calculation in patients with high myopia and cataracts.<b>METHODS:</b>Immersion B-scan, contact A-scan ultrasonography (contact A-scan), and the IOLMaster were used to preoperatively measure the AL in 102 eyes from 102 patients who underwent phacoemulsification and IOL implantation. Patients were divided into two groups according to the AL:one containing patients with 22 mm≤AL<26 mm(group A) and the other containing patients with AL≥26 mm (group B). The mean error (ME) was calculated from the difference between the AL measurement methods predicted refractive error and the actual postoperative refractive error.<b>RESULTS:</b>In group A, ALs measured by immersion B-scan (23.48±1.15) didn’t differ significantly from those measured by the IOLMaster (23.52±1.17) or from those by contact A-scan (23.38±1.20). In the same group, the standard deviation (SD) of the mean error (ME) of immersion B-scan (-0.090±0.397 D) didn’t differ significantly from those of IOLMaster (-0.095±0.411 D) and contact A-scan (-0.099±0.425 D). In group B, ALs measured by immersion B-scan (27.97±2.21 mm) didn’t differ significantly from those of the IOLMaster (27.86±2.18 mm), but longer than those measured by Contact A-scan (27.75±2.23 mm, <i>P=</i>0.009). In the same group, the standard deviation (SD) of the mean error (ME) of immersion B-scan (-0.635±0.157 D) didn’t differ significantly from those of the IOLMaster (-0.679±0.359 D), but differed significantly from those of contact A-scan (-0.953±1.713 D, <i>P=</i>0.028).<b>CONCLUSION:</b>Immersion B-scan exhibits measurement accuracy comparable to that of the IOLMaster, and is thus a good alternative in measuring AL in eyes with high myopia when the IOLMaster can’t be used, and it is more accurate than the contact A-scan. |
| first_indexed | 2024-12-13T06:13:29Z |
| format | Article |
| id | doaj.art-7face8d0ccba4105a5010ed59c31634b |
| institution | Directory Open Access Journal |
| issn | 2222-3959 2227-4898 |
| language | English |
| last_indexed | 2024-12-13T06:13:29Z |
| publishDate | 2014-06-01 |
| publisher | Press of International Journal of Ophthalmology (IJO PRESS) |
| record_format | Article |
| series | International Journal of Ophthalmology |
| spelling | doaj.art-7face8d0ccba4105a5010ed59c31634b2022-12-21T23:57:02ZengPress of International Journal of Ophthalmology (IJO PRESS)International Journal of Ophthalmology2222-39592227-48982014-06-017344144410.3980/j.issn.2222-3959.2014.03.10Accuracy of axial length measurements from immersion B-scan ultrasonography in highly myopic eyesQing-Hua Yang0Bing Chen1Guang-Hua Peng2Zhao-Hui Li3Yi-Fei Huang4Department of Ophthalmology, Chinese PLA General Hospital, 28 Fuxing Road, Haidian District, Beijing 100853, ChinaDepartment of Ophthalmology, Chinese PLA General Hospital, 28 Fuxing Road, Haidian District, Beijing 100853, ChinaDepartment of Ophthalmology, Chinese PLA General Hospital, 28 Fuxing Road, Haidian District, Beijing 100853, ChinaDepartment of Ophthalmology, Chinese PLA General Hospital, 28 Fuxing Road, Haidian District, Beijing 100853, ChinaDepartment of Ophthalmology, Chinese PLA General Hospital, 28 Fuxing Road, Haidian District, Beijing 100853, China<b>AIM:</b>To evaluate the accuracy of axial length (AL) measurements obtained from immersion B-scan ultrasonography (immersion B-scan) for intraocular lens (IOL) power calculation in patients with high myopia and cataracts.<b>METHODS:</b>Immersion B-scan, contact A-scan ultrasonography (contact A-scan), and the IOLMaster were used to preoperatively measure the AL in 102 eyes from 102 patients who underwent phacoemulsification and IOL implantation. Patients were divided into two groups according to the AL:one containing patients with 22 mm≤AL<26 mm(group A) and the other containing patients with AL≥26 mm (group B). The mean error (ME) was calculated from the difference between the AL measurement methods predicted refractive error and the actual postoperative refractive error.<b>RESULTS:</b>In group A, ALs measured by immersion B-scan (23.48±1.15) didn’t differ significantly from those measured by the IOLMaster (23.52±1.17) or from those by contact A-scan (23.38±1.20). In the same group, the standard deviation (SD) of the mean error (ME) of immersion B-scan (-0.090±0.397 D) didn’t differ significantly from those of IOLMaster (-0.095±0.411 D) and contact A-scan (-0.099±0.425 D). In group B, ALs measured by immersion B-scan (27.97±2.21 mm) didn’t differ significantly from those of the IOLMaster (27.86±2.18 mm), but longer than those measured by Contact A-scan (27.75±2.23 mm, <i>P=</i>0.009). In the same group, the standard deviation (SD) of the mean error (ME) of immersion B-scan (-0.635±0.157 D) didn’t differ significantly from those of the IOLMaster (-0.679±0.359 D), but differed significantly from those of contact A-scan (-0.953±1.713 D, <i>P=</i>0.028).<b>CONCLUSION:</b>Immersion B-scan exhibits measurement accuracy comparable to that of the IOLMaster, and is thus a good alternative in measuring AL in eyes with high myopia when the IOLMaster can’t be used, and it is more accurate than the contact A-scan.http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4067656/axial lengthmeasurementimmersionultrasonographyhigh myopiahigh myopia |
| spellingShingle | Qing-Hua Yang Bing Chen Guang-Hua Peng Zhao-Hui Li Yi-Fei Huang Accuracy of axial length measurements from immersion B-scan ultrasonography in highly myopic eyes International Journal of Ophthalmology axial length measurement immersion ultrasonography high myopia high myopia |
| title | Accuracy of axial length measurements from immersion B-scan ultrasonography in highly myopic eyes |
| title_full | Accuracy of axial length measurements from immersion B-scan ultrasonography in highly myopic eyes |
| title_fullStr | Accuracy of axial length measurements from immersion B-scan ultrasonography in highly myopic eyes |
| title_full_unstemmed | Accuracy of axial length measurements from immersion B-scan ultrasonography in highly myopic eyes |
| title_short | Accuracy of axial length measurements from immersion B-scan ultrasonography in highly myopic eyes |
| title_sort | accuracy of axial length measurements from immersion b scan ultrasonography in highly myopic eyes |
| topic | axial length measurement immersion ultrasonography high myopia high myopia |
| url | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4067656/ |
| work_keys_str_mv | AT qinghuayang accuracyofaxiallengthmeasurementsfromimmersionbscanultrasonographyinhighlymyopiceyes AT bingchen accuracyofaxiallengthmeasurementsfromimmersionbscanultrasonographyinhighlymyopiceyes AT guanghuapeng accuracyofaxiallengthmeasurementsfromimmersionbscanultrasonographyinhighlymyopiceyes AT zhaohuili accuracyofaxiallengthmeasurementsfromimmersionbscanultrasonographyinhighlymyopiceyes AT yifeihuang accuracyofaxiallengthmeasurementsfromimmersionbscanultrasonographyinhighlymyopiceyes |