Hany Ahmed Helaly, Mohamed Hassan Elkhawaga, Mohamed Sobhy El-Mansy, Mohamed Sobhy Hassan
{"title":"研究分段总和生物测量法对现代短眼眼内透镜功率计算公式的附加作用。","authors":"Hany Ahmed Helaly, Mohamed Hassan Elkhawaga, Mohamed Sobhy El-Mansy, Mohamed Sobhy Hassan","doi":"10.1186/s12886-025-03896-1","DOIUrl":null,"url":null,"abstract":"<p><strong>Purpose: </strong>To study the added effect of sum-of-segments (SOS) biometry to modern intraocular lens power calculation formulas for eyes with short axial length.</p><p><strong>Methods: </strong>This was a retrospective case series that included 99 eyes from 99 patients. Preoperative AXL measurements were conducted utilizing the ARGOS biometer (Alcon, Inc., Fort Worth, TX). The following formulas were used: Barrett Universal II (BUII), Cooke K6, EVO 2.0, and PEARL-DGS formulas. Additionally, the Barrett formula has been updated and is now incorporated into the ARGOS biometer, introducing the Barrett true axial length (BTAL) formula.</p><p><strong>Results: </strong>EVO 2.0<sub>sos</sub> and PEARL-DGS<sub>sos</sub> formulas had the highest cases within ± 0.25 D of the intended refraction (45.45% and 42.42%, respectively). The PEARL-DGS<sub>sos</sub> was the only formula to show a myopic mean prediction error (-0.25 ± 0.36 D). The Cooke K6 formula showed the highest hyperopic mean prediction error (0.55 ± 0.35 D), followed by EVO 2.0, Cooke K6<sub>sos</sub>, and BUII formulas. BTAL had mean prediction error of 0.15 ± 0.47 which is less hyperopic than BUII (0.43 ± 0.39 D). Subgroup analysis of eyes with AXL 21 mm or shorter (n = 57) was done. Again, the PEARL-DGS<sub>sos</sub> formula showed the only myopic mean prediction error (-0.23 ± 0.37 D).</p><p><strong>Conclusion: </strong>PEARL-DGS<sub>sos</sub> was the only formula to show a myopic mean prediction error. Using BTAL and SOS option in Cooke K6, EVO 2.0, and PEARL-DGS formulas decreased the undesirable hyperopic shift in the mean prediction error. This effect was more evident in shorter eyes ≤ 21.0 mm.</p>","PeriodicalId":9058,"journal":{"name":"BMC Ophthalmology","volume":"25 1","pages":"63"},"PeriodicalIF":1.7000,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11816771/pdf/","citationCount":"0","resultStr":"{\"title\":\"Studying the added effect of sum-of-segments biometry to modern intraocular lens power calculation formulas for short eyes.\",\"authors\":\"Hany Ahmed Helaly, Mohamed Hassan Elkhawaga, Mohamed Sobhy El-Mansy, Mohamed Sobhy Hassan\",\"doi\":\"10.1186/s12886-025-03896-1\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Purpose: </strong>To study the added effect of sum-of-segments (SOS) biometry to modern intraocular lens power calculation formulas for eyes with short axial length.</p><p><strong>Methods: </strong>This was a retrospective case series that included 99 eyes from 99 patients. Preoperative AXL measurements were conducted utilizing the ARGOS biometer (Alcon, Inc., Fort Worth, TX). The following formulas were used: Barrett Universal II (BUII), Cooke K6, EVO 2.0, and PEARL-DGS formulas. Additionally, the Barrett formula has been updated and is now incorporated into the ARGOS biometer, introducing the Barrett true axial length (BTAL) formula.</p><p><strong>Results: </strong>EVO 2.0<sub>sos</sub> and PEARL-DGS<sub>sos</sub> formulas had the highest cases within ± 0.25 D of the intended refraction (45.45% and 42.42%, respectively). The PEARL-DGS<sub>sos</sub> was the only formula to show a myopic mean prediction error (-0.25 ± 0.36 D). The Cooke K6 formula showed the highest hyperopic mean prediction error (0.55 ± 0.35 D), followed by EVO 2.0, Cooke K6<sub>sos</sub>, and BUII formulas. BTAL had mean prediction error of 0.15 ± 0.47 which is less hyperopic than BUII (0.43 ± 0.39 D). Subgroup analysis of eyes with AXL 21 mm or shorter (n = 57) was done. Again, the PEARL-DGS<sub>sos</sub> formula showed the only myopic mean prediction error (-0.23 ± 0.37 D).</p><p><strong>Conclusion: </strong>PEARL-DGS<sub>sos</sub> was the only formula to show a myopic mean prediction error. Using BTAL and SOS option in Cooke K6, EVO 2.0, and PEARL-DGS formulas decreased the undesirable hyperopic shift in the mean prediction error. This effect was more evident in shorter eyes ≤ 21.0 mm.</p>\",\"PeriodicalId\":9058,\"journal\":{\"name\":\"BMC Ophthalmology\",\"volume\":\"25 1\",\"pages\":\"63\"},\"PeriodicalIF\":1.7000,\"publicationDate\":\"2025-02-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11816771/pdf/\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"BMC Ophthalmology\",\"FirstCategoryId\":\"3\",\"ListUrlMain\":\"https://doi.org/10.1186/s12886-025-03896-1\",\"RegionNum\":4,\"RegionCategory\":\"医学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"OPHTHALMOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"BMC Ophthalmology","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1186/s12886-025-03896-1","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"OPHTHALMOLOGY","Score":null,"Total":0}
Studying the added effect of sum-of-segments biometry to modern intraocular lens power calculation formulas for short eyes.
Purpose: To study the added effect of sum-of-segments (SOS) biometry to modern intraocular lens power calculation formulas for eyes with short axial length.
Methods: This was a retrospective case series that included 99 eyes from 99 patients. Preoperative AXL measurements were conducted utilizing the ARGOS biometer (Alcon, Inc., Fort Worth, TX). The following formulas were used: Barrett Universal II (BUII), Cooke K6, EVO 2.0, and PEARL-DGS formulas. Additionally, the Barrett formula has been updated and is now incorporated into the ARGOS biometer, introducing the Barrett true axial length (BTAL) formula.
Results: EVO 2.0sos and PEARL-DGSsos formulas had the highest cases within ± 0.25 D of the intended refraction (45.45% and 42.42%, respectively). The PEARL-DGSsos was the only formula to show a myopic mean prediction error (-0.25 ± 0.36 D). The Cooke K6 formula showed the highest hyperopic mean prediction error (0.55 ± 0.35 D), followed by EVO 2.0, Cooke K6sos, and BUII formulas. BTAL had mean prediction error of 0.15 ± 0.47 which is less hyperopic than BUII (0.43 ± 0.39 D). Subgroup analysis of eyes with AXL 21 mm or shorter (n = 57) was done. Again, the PEARL-DGSsos formula showed the only myopic mean prediction error (-0.23 ± 0.37 D).
Conclusion: PEARL-DGSsos was the only formula to show a myopic mean prediction error. Using BTAL and SOS option in Cooke K6, EVO 2.0, and PEARL-DGS formulas decreased the undesirable hyperopic shift in the mean prediction error. This effect was more evident in shorter eyes ≤ 21.0 mm.
期刊介绍：
BMC Ophthalmology is an open access, peer-reviewed journal that considers articles on all aspects of the prevention, diagnosis and management of eye disorders, as well as related molecular genetics, pathophysiology, and epidemiology.
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