Calculation of Toric Intraocular Lens Power with the Barrett Calculator and Data from Three Keratometers
Aim. To investigate the interdevice agreement for differences in toric power calculated using data on anterior corneal astigmatism obtained with corneal topography/ray-tracing aberrometry (iTrace), partial coherence interferometry (IOLMaster 500), and Scheimpflug imaging (Pentacam). Methods. The ana...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2021-01-01
|
| Series: | Journal of Tropical Medicine |
| Online Access: | http://dx.doi.org/10.1155/2021/7712345 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832567704270143488 |
|---|---|
| author | Jing Dong Yaqin Zhang Xiaogang Wang |
| author_facet | Jing Dong Yaqin Zhang Xiaogang Wang |
| author_sort | Jing Dong |
| collection | DOAJ |
| description | Aim. To investigate the interdevice agreement for differences in toric power calculated using data on anterior corneal astigmatism obtained with corneal topography/ray-tracing aberrometry (iTrace), partial coherence interferometry (IOLMaster 500), and Scheimpflug imaging (Pentacam). Methods. The analysis included 101 eyes (101 subjects) with regular astigmatism. The main outcome measures were corneal cylinder power, axis of astigmatism, and keratometry values. Toricity and toric IOL power were calculated using the online Barrett toric calculator. Interdevice agreement for measurement and calculation was assessed using a paired sample t-test and a nonparametric test. Results. Significant interdevice differences were noted in the magnitude of astigmatism and flat, steep, and mean keratometry values between iTrace and IOLMaster (all P<0.01); in flat, steep, and mean keratometry values (all P<0.001) but not in the magnitude of astigmatism (P=0.325) between iTrace and Pentacam; and in the magnitude of astigmatism and steep and mean keratometry values (all P<0.01) but not in flat keratometry values (P=0.310) between IOLMaster and Pentacam. The toric IOL power calculated using data from the three devices showed the following trend: iTrace > IOLMaster (0.49 ± 0.36, P<0.001) and Pentacam (0.39 ± 0.42, P<0.001) and Pentacam was <IOLMaster (−0.10 ± 0.39, P=0.009). There were differences in toricity calculated using data from the three devices (P=0.004). Conclusions. Differences in toric IOL power and toricity calculated using anterior keratometry data from iTrace, IOLMaster 500, and Pentacam should be noted in clinical practice. |
| format | Article |
| id | doaj-art-0dd79502beac4a12a4bd38947c9fb352 |
| institution | Kabale University |
| issn | 1687-9686 1687-9694 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Tropical Medicine |
| spelling | doaj-art-0dd79502beac4a12a4bd38947c9fb3522025-02-03T01:00:47ZengWileyJournal of Tropical Medicine1687-96861687-96942021-01-01202110.1155/2021/77123457712345Calculation of Toric Intraocular Lens Power with the Barrett Calculator and Data from Three KeratometersJing Dong0Yaqin Zhang1Xiaogang Wang2The First Hospital of Shanxi Medical University, Taiyuan, Shanxi, ChinaShanxi Eye Hospital Affiliated to Shanxi Medical University, Taiyuan, Shanxi, ChinaShanxi Eye Hospital Affiliated to Shanxi Medical University, Taiyuan, Shanxi, ChinaAim. To investigate the interdevice agreement for differences in toric power calculated using data on anterior corneal astigmatism obtained with corneal topography/ray-tracing aberrometry (iTrace), partial coherence interferometry (IOLMaster 500), and Scheimpflug imaging (Pentacam). Methods. The analysis included 101 eyes (101 subjects) with regular astigmatism. The main outcome measures were corneal cylinder power, axis of astigmatism, and keratometry values. Toricity and toric IOL power were calculated using the online Barrett toric calculator. Interdevice agreement for measurement and calculation was assessed using a paired sample t-test and a nonparametric test. Results. Significant interdevice differences were noted in the magnitude of astigmatism and flat, steep, and mean keratometry values between iTrace and IOLMaster (all P<0.01); in flat, steep, and mean keratometry values (all P<0.001) but not in the magnitude of astigmatism (P=0.325) between iTrace and Pentacam; and in the magnitude of astigmatism and steep and mean keratometry values (all P<0.01) but not in flat keratometry values (P=0.310) between IOLMaster and Pentacam. The toric IOL power calculated using data from the three devices showed the following trend: iTrace > IOLMaster (0.49 ± 0.36, P<0.001) and Pentacam (0.39 ± 0.42, P<0.001) and Pentacam was <IOLMaster (−0.10 ± 0.39, P=0.009). There were differences in toricity calculated using data from the three devices (P=0.004). Conclusions. Differences in toric IOL power and toricity calculated using anterior keratometry data from iTrace, IOLMaster 500, and Pentacam should be noted in clinical practice.http://dx.doi.org/10.1155/2021/7712345 |
| spellingShingle | Jing Dong Yaqin Zhang Xiaogang Wang Calculation of Toric Intraocular Lens Power with the Barrett Calculator and Data from Three Keratometers Journal of Tropical Medicine |
| title | Calculation of Toric Intraocular Lens Power with the Barrett Calculator and Data from Three Keratometers |
| title_full | Calculation of Toric Intraocular Lens Power with the Barrett Calculator and Data from Three Keratometers |
| title_fullStr | Calculation of Toric Intraocular Lens Power with the Barrett Calculator and Data from Three Keratometers |
| title_full_unstemmed | Calculation of Toric Intraocular Lens Power with the Barrett Calculator and Data from Three Keratometers |
| title_short | Calculation of Toric Intraocular Lens Power with the Barrett Calculator and Data from Three Keratometers |
| title_sort | calculation of toric intraocular lens power with the barrett calculator and data from three keratometers |
| url | http://dx.doi.org/10.1155/2021/7712345 |
| work_keys_str_mv | AT jingdong calculationoftoricintraocularlenspowerwiththebarrettcalculatoranddatafromthreekeratometers AT yaqinzhang calculationoftoricintraocularlenspowerwiththebarrettcalculatoranddatafromthreekeratometers AT xiaogangwang calculationoftoricintraocularlenspowerwiththebarrettcalculatoranddatafromthreekeratometers |