Intraocular lens power calculation formulas in Chinese eyes with high axial myopia

Tsang, C S L; Chong, Gabriela S. L.; Yiu, Evan Pf; Ho, Chi-kin

doi:10.1016/s0886-3350(02)01976-4

Cited by 61 publications

(52 citation statements)

References 10 publications

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“…2, 8, 10 Zaldivar et al 11 reported that 92% of eyes were within ±1.0D when using SRK/T, and concluded that in eyes with axial lengths ≥ 27.0 mm, current third-and fourth-generation lens calculation formulas have a tendency to over minus patients between -1.0 and -4.0 D, leaving patients with postoperative hyperopia. Similarly, Tsang et al 2 found that SRK/T formula showed a slight tendency toward resultant hyperopia, resulting in a postoperative hyperopic refractive error.…”

Section: Discussionmentioning

confidence: 83%

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The Analysis of Refraction and Accommodation of Extreme Myopia with Cataract after Phacoemulsification and IOL Implantation

Al-Wesabi¹,

Yang²,

Li³

et al. 2016

IOSR

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Abstract:Background: To assess the refractive status of cataract patients with extreme myopia and to measure their accommodative capability after monofocal IOL implantation. Design: Prospective non-randomized study conducted at Tianjin Medical University Eye Centre.Participants: 18 patients with 34 extreme myopic eyes ≥27mm axial length), and 14 patients with 27 non-myopic eyes that had uneventful phacoemulsification and monofocal IOL implantation. Methods:The accommodation amplitude of the two groups was compared pre-and post-operatively using subjective minus-lenses-to-blur method. In the extreme myopic group, the postoperative target refraction was selected to be myopic, and they were evaluated for predicted postoperative spherical power consistency.

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Section: Discussionmentioning

confidence: 83%

“…1 However, the refractive outcome is also less predictable in highly myopic eyes due to inaccuracies in axial length (AL) measurement in the presence of posterior staphyloma and poor fixation from macular disease. 2 It has been accepted that monofocal IOL implantation corrects visual acuity for either distance or near vision.…”

Section: Introductionmentioning

confidence: 99%

The Analysis of Refraction and Accommodation of Extreme Myopia with Cataract after Phacoemulsification and IOL Implantation

Al-Wesabi¹,

Yang²,

Li³

et al. 2016

IOSR

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“…Wang JK, et al 7 concluded IOL power calculated using the Haigis formula predicted the best refractive outcome in long eyes. El-Nafees R, et al 8 and Tsang CS, et al 9 found the performance of SRK -T to give least amount of error. Petermeier and Szurman.…”

Section: Age 43 To 69 Yearsmentioning

confidence: 99%

Predictive Accuracy of Various Iol Power Calculation Formulae in High Axial Myopia: A Prospective Comparative Study

Thakur¹,

Saxena²,

Jain³

et al. 2016

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PURPOSETo compare the accuracy of Intraocular Lens (IOL) power calculation formulae in high axial myopia. MATERIAL AND METHODS27 eyes of 22 patients with axial length between 26mm to 30mm were studied. The eyes were divided in to two groups, Group 1 with AL 26-28mm consisting of 23 eyes and Group 2 with AL 28-30mm consisting of four eyes. The predictive accuracy of four formulae SRK-T, Hoffer Q, Haigis and Holladay 2 were evaluated and compared. The statistical analysis was carried out with SPSS Software 21.0 version with P value >0.05 considered significant. RESULTSThe predictive capability within ±1 D of these formulae in Group 1 is 88% with SRK-T, 87% with Hoffer Q, 88% with Haigis and 91% with Holladay 2 and within ±0.5 D is 61%, 61%, 69% and 73% respectively. In Group 2 which consisted of 4 eyes with AL between 28-30mm the results were 83%, 83%, 84%, 90%, 59%, 61%, 70%, 71% respectively. CONCLUSIONThe performance of SRK-T, Hoffer Q and Haigis was comparable for target refraction of ±1.0 D, whereas Haigis and Holladay 2 gave relatively better results for target refraction of ±0.5 D for Group 1 and Haigis and Holladay 2 performed better for Group 2.

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“…Die SRK-T-Formel ist eine etablierte Methode zur Biometrie bei Patienten mit hoher Achsenmyopie und hinsichtlich refraktiver Ergebnisse der Haigis-oder Holladay-1-Formel ähnlich [11,15,18,20]. Haigis [4] hat aber kürzlich die Bedeutung unterschiedlicher A-Konstanten für Positiv-Dioptrien-und Negativ-Dioptrien-IOLs hervorgehoben.…”

Section: Diskussionunclassified

“…Der Durchmesser der Linsenkapsel ist proportional zur Achsenlänge des Auges[15,18]. Aufgrund dieser Tatsache lassen sich evtl.…”

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Refraktive Vorhersagbarkeit und Stabilität von 3-teiligen vs. 1-teiligen Intraokularlinsen bei hoher Achsenmyopie

et al. 2012

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Intraocular lens power calculation formulas in Chinese eyes with high axial myopia

Cited by 61 publications

References 10 publications

The Analysis of Refraction and Accommodation of Extreme Myopia with Cataract after Phacoemulsification and IOL Implantation

The Analysis of Refraction and Accommodation of Extreme Myopia with Cataract after Phacoemulsification and IOL Implantation

Predictive Accuracy of Various Iol Power Calculation Formulae in High Axial Myopia: A Prospective Comparative Study

Refraktive Vorhersagbarkeit und Stabilität von 3-teiligen vs. 1-teiligen Intraokularlinsen bei hoher Achsenmyopie

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