Estimation of Intraocular Lens Power Calculation Formula in Irregular Astigmatism With Normal Axial Length Eyes
Background and Objectives: We evaluated the intraocular lens power calculation (IOL) formulas in eyes with cataracts and irregular astigmatism who have undergone cataract surgery. Methods: In a retrospective case series, 50 eyes with cataracts and irregular astigmatism who underwent phacoemulsificat...
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| Format: | Article |
| Language: | English |
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Iran University of Medical Sciences
2021-02-01
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| Series: | Function and Disability Journal |
| Subjects: | |
| Online Access: | http://fdj.iums.ac.ir/article-1-163-en.html |
| _version_ | 1818201076596211712 |
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| author | Leila Mirzaei Saba Mohammadali Hassani Ebrahim Jafarzadehpour Ali Mirzajani |
| author_facet | Leila Mirzaei Saba Mohammadali Hassani Ebrahim Jafarzadehpour Ali Mirzajani |
| author_sort | Leila Mirzaei Saba |
| collection | DOAJ |
| description | Background and Objectives: We evaluated the intraocular lens power calculation (IOL) formulas in eyes with cataracts and irregular astigmatism who have undergone cataract surgery.
Methods: In a retrospective case series, 50 eyes with cataracts and irregular astigmatism who underwent phacoemulsification with IOL implantation were assessed. The IOL power was determined using the data of the keratometry of IOL master-derived keratometry in five formulas: Haigis, Hoffer Q, Holladay 1, SRK2 and SRKT. One month after surgery, refractive error and visual acuity were assessed.
Results: The Mean±SD age of participants was 66.10±6.57 years (ranged 32-83). The percentage of male and female subjects was 45.8% and 54.2%, respectively. The axial length was 19.00mm to 23.00mm, which is a normal range. The most and least used formulas were SRKT and Haigis, respectively. Astigmatism and spherical refractive errors before and after surgery had significant differences (P<0.001). There was a decrease in astigmatism and hyperopic shift after surgery.
Conclusion: SRKT is a suitable formula for this group of patients. According to a decrease in astigmatism and hyperopic shift, an improvement in visual acuity can be expected. |
| first_indexed | 2024-12-12T02:47:48Z |
| format | Article |
| id | doaj.art-91634208aa1440058d36fd91f4c9ae20 |
| institution | Directory Open Access Journal |
| issn | 2588-6304 |
| language | English |
| last_indexed | 2024-12-12T02:47:48Z |
| publishDate | 2021-02-01 |
| publisher | Iran University of Medical Sciences |
| record_format | Article |
| series | Function and Disability Journal |
| spelling | doaj.art-91634208aa1440058d36fd91f4c9ae202022-12-22T00:40:59ZengIran University of Medical SciencesFunction and Disability Journal2588-63042021-02-01414646Estimation of Intraocular Lens Power Calculation Formula in Irregular Astigmatism With Normal Axial Length EyesLeila Mirzaei Saba0Mohammadali Hassani1Ebrahim Jafarzadehpour2Ali Mirzajani3 Department of Optometry, School of Rehabilitation Sciences, Iran University of Medical Science, Tehran, Iran. Department of Optometry, School of Rehabilitation Sciences, Iran University of Medical Science, Tehran, Iran. Rehabilitation Research Center, Iran University of Medical Sciences, Tehran, Iran. Rehabilitation Research Center, Iran University of Medical Sciences, Tehran, Iran. Background and Objectives: We evaluated the intraocular lens power calculation (IOL) formulas in eyes with cataracts and irregular astigmatism who have undergone cataract surgery. Methods: In a retrospective case series, 50 eyes with cataracts and irregular astigmatism who underwent phacoemulsification with IOL implantation were assessed. The IOL power was determined using the data of the keratometry of IOL master-derived keratometry in five formulas: Haigis, Hoffer Q, Holladay 1, SRK2 and SRKT. One month after surgery, refractive error and visual acuity were assessed. Results: The Mean±SD age of participants was 66.10±6.57 years (ranged 32-83). The percentage of male and female subjects was 45.8% and 54.2%, respectively. The axial length was 19.00mm to 23.00mm, which is a normal range. The most and least used formulas were SRKT and Haigis, respectively. Astigmatism and spherical refractive errors before and after surgery had significant differences (P<0.001). There was a decrease in astigmatism and hyperopic shift after surgery. Conclusion: SRKT is a suitable formula for this group of patients. According to a decrease in astigmatism and hyperopic shift, an improvement in visual acuity can be expected.http://fdj.iums.ac.ir/article-1-163-en.htmliol calculationcataract surgeryirregular astigmatism |
| spellingShingle | Leila Mirzaei Saba Mohammadali Hassani Ebrahim Jafarzadehpour Ali Mirzajani Estimation of Intraocular Lens Power Calculation Formula in Irregular Astigmatism With Normal Axial Length Eyes Function and Disability Journal iol calculation cataract surgery irregular astigmatism |
| title | Estimation of Intraocular Lens Power Calculation Formula in Irregular Astigmatism With Normal Axial Length Eyes |
| title_full | Estimation of Intraocular Lens Power Calculation Formula in Irregular Astigmatism With Normal Axial Length Eyes |
| title_fullStr | Estimation of Intraocular Lens Power Calculation Formula in Irregular Astigmatism With Normal Axial Length Eyes |
| title_full_unstemmed | Estimation of Intraocular Lens Power Calculation Formula in Irregular Astigmatism With Normal Axial Length Eyes |
| title_short | Estimation of Intraocular Lens Power Calculation Formula in Irregular Astigmatism With Normal Axial Length Eyes |
| title_sort | estimation of intraocular lens power calculation formula in irregular astigmatism with normal axial length eyes |
| topic | iol calculation cataract surgery irregular astigmatism |
| url | http://fdj.iums.ac.ir/article-1-163-en.html |
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