A Comparative Study to Assess the  Predictability of Different IOL Power  Calculation Formulas in Eyes of Short  and Long Axial Length

Doshi, Dharmil; Limdi, Purvi; Parekh, Nilesh V.; Gohil, Neepa R.

doi:10.7860/jcdr/2017/22095.9136

Cited by 29 publications

(28 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For this purpose, we compared the results obtained through Haigis formula and then we compared these results with estimates based on a method in which both K readings are considered. Haigis has been the formula of choice due to the good refractive results provided 1,18,19 despite the Effective Lens Position (ELP) method calculation, and its interaction with IOL power calculation has not been fully published.…”

Section: Introductionmentioning

confidence: 99%

Intraocular lens bicylindric power calculation method: Using both flat and steep K readings to improve intraocular lens power prediction

Calvo-Sanz¹,

Ruiz-Alcocer

Sánchez-Tena

2018

European Journal of Ophthalmology

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Intraocular lens bicylindric power calculation method: Using both flat and steep K readings to improve intraocular lens power prediction

Calvo-Sanz¹,

Ruiz-Alcocer

Sánchez-Tena

2018

European Journal of Ophthalmology

View full text Add to dashboard Cite

show abstract

“…The lens anatomy parameters (LD, LT and LV) were also analyzed by stratifying the eyes into groups of short (<22.0 mm), normal (22.0 to 24.5 mm) and long (>24.5 mm) AL. [34][35][36][37][38][39][40] The Pearson Coefficient (r value) was determined to evaluate the strength of all correlation pairs. The strength of the correlations was graded as follows: r=0.00 -0.10: negligible correlation; 0.10 -0.39: weak correlation; 0.40 -0.69: moderate correlation; 0.70 -0.89: strong correlation; 0.90 -1.00: very strong correlation.…”

Section: Discussionmentioning

confidence: 99%

Correlation of Intraoperative Optical Coherence Tomography of Crystalline Lens Diameter, Thickness, and Volume with Biometry and Age

Waring¹,

Chang

Rocha

et al. 2021

American Journal of Ophthalmology

View full text Add to dashboard Cite

This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

show abstract

“…This does not mean than classical intraocular power calculation is wrong, absolutely. Haigis calculation with mean keratometry, as well as other described formulas, has previously showed good refractive results in varied anatomical eye conditions,[ 2 3 4 5 6 7 17 18 19 20 21 22 ] nevertheless, the use of both keratometry readings seems to be a determining factor to reduce uncertainty with the expected refraction.…”

Section: Discussionmentioning

confidence: 99%

“…Nowadays, cataract surgery is almost considered as a refractive surgery technique in developed countries. [ 1 ] Comprehensive knowledge and understanding of calculation formulas and how they calculate the intraocular lens (IOL) power according to biometrical and anatomical parameters[ 2 3 4 5 6 7 ] should be mandatory in ophthalmologic consultations.…”

mentioning

confidence: 99%

Clinical application of bicylindric intraocular lens power calculation method

Calvo-Sanz

Bonnin-Arias

Arias-Puente

2020

Indian J Ophthalmol

View full text Add to dashboard Cite

Purpose: To analyze the reliability of the refractive results prediction obtained in intraocular lens (IOL) calculation using bicylindric power calculation method, with the use of steep and flat keratometry readings compared with the classical mean keratometry calculation method. Methods: Fifty-seven eyes of 57 subjects who underwent cataract surgery were included in this prospective study. Optical biometry was performed with IOLMaster 700 and IOL power calculation was performed using both keratometry readings and the surgically induced astigmatism. Four weeks after surgery, subjective refraction was done. Finally, results obtained with both IOL calculation methods were compared. Results: Mean spherical equivalent using bicylindric IOL power calculation method was - 0.082 ± 0.296D, and achieved mean spherical equivalent using classical IOL power method with Haigis formula was - 0.088 ± 0.405D. Achieved mean spherical equivalent obtained in subjective refraction after surgery was - 0.101 ± 0.265D. Linear correlation between bicylindric method spherical equivalent calculation and achieved spherical equivalent was statistically significant ( r = 0.761, P < 0.001), also correlation between Haigis spherical equivalent calculation and achieved spherical equivalent was statistically significant ( r = 0.339, P = 0.010). Emmetropia was achieved in 49 of 57 (85.86%) subjects and bicylindric method calculated that 49 of 57 (85.86%) of subjects would get emmetropia ( P = 1.000). Classical IOL power calculation estimated that 38/57 subjects would get emmetropia (66.67%) ( P = 0.026). Conclusion: The IOL power calculation including both keratometry readings and surgically induced astigmatism seems to be more accurate and provides more precision in refractive prediction than classical calculation method.

show abstract

A Comparative Study to Assess the Predictability of Different IOL Power Calculation Formulas in Eyes of Short and Long Axial Length

Cited by 29 publications

References 8 publications

Intraocular lens bicylindric power calculation method: Using both flat and steep K readings to improve intraocular lens power prediction

Intraocular lens bicylindric power calculation method: Using both flat and steep K readings to improve intraocular lens power prediction

Correlation of Intraoperative Optical Coherence Tomography of Crystalline Lens Diameter, Thickness, and Volume with Biometry and Age

Clinical application of bicylindric intraocular lens power calculation method

Contact Info

Product

Resources

About