The Influence of Pupil Dilation on Predicted Postoperative Refraction Calculated by Using Third and Fourth Generation Calculation Formulas in Pre-Presbyopia Patients
Effat Haroun, H., Osman Abdelkhalek, M., moataz Mohammad Murad, M., Nabeel Sadek, S. (2021). The Influence of Pupil Dilation on Predicted Postoperative Refraction Calculated by Using Third and Fourth Generation Calculation Formulas in Pre-Presbyopia Patients. EKB Journal Management System, 2(1), 143-154. doi: 10.21608/ejmr.2021.146091
Hazem Effat Haroun; Mohammad Osman Abdelkhalek; Mohammad moataz Mohammad Murad; Shimaa Nabeel Sadek. "The Influence of Pupil Dilation on Predicted Postoperative Refraction Calculated by Using Third and Fourth Generation Calculation Formulas in Pre-Presbyopia Patients". EKB Journal Management System, 2, 1, 2021, 143-154. doi: 10.21608/ejmr.2021.146091
Effat Haroun, H., Osman Abdelkhalek, M., moataz Mohammad Murad, M., Nabeel Sadek, S. (2021). 'The Influence of Pupil Dilation on Predicted Postoperative Refraction Calculated by Using Third and Fourth Generation Calculation Formulas in Pre-Presbyopia Patients', EKB Journal Management System, 2(1), pp. 143-154. doi: 10.21608/ejmr.2021.146091
Effat Haroun, H., Osman Abdelkhalek, M., moataz Mohammad Murad, M., Nabeel Sadek, S. The Influence of Pupil Dilation on Predicted Postoperative Refraction Calculated by Using Third and Fourth Generation Calculation Formulas in Pre-Presbyopia Patients. EKB Journal Management System, 2021; 2(1): 143-154. doi: 10.21608/ejmr.2021.146091

The Influence of Pupil Dilation on Predicted Postoperative Refraction Calculated by Using Third and Fourth Generation Calculation Formulas in Pre-Presbyopia Patients

Egyptian Journal of Medical Research
Article 10, Volume 2, Issue 1, January 2021, Page 143-154  XML PDF (572.27 K)
Document Type: Original Article
DOI: 10.21608/ejmr.2021.146091
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Authors
Hazem Effat Haroun1; Mohammad Osman Abdelkhalek1; Mohammad moataz Mohammad Murad2; Shimaa Nabeel Sadek3
1Ophthalmology department, Faculty of Medicine, Beni-Suef University, Egypt
2Ophthalmology department, Research institute Of Ophthalmology , Egypt
3M.B.B.CH, Faculty of Medicine, Cairo University, Egypt
Abstract
The goal of this study is to assess the effect of pupillary dilation on predicted post-operative  refraction  (the Plano or least minus refraction) and on recommended intraocular lens (IOL) power calculated by using the third generation and fourth generation formula to measure the difference  between pre  and   post   pupil  dilation  on ACD. This   study included 40 eyes with cataract will undergo phacoemulsification and divided into two   group  Group (A): 20 cataract patients with biometry by third formula (SRK/T and Hoffer Q).  Group (B):  other 20 cataract patients with biometry by fourth formula (Holladay 2). There were statically non-significant differences found between PPR before and after  pupil dilation in    Group A and  Group B with p value 0.861and 0.181 respectively. The main age of our patient in group A ranged from (21 – 42) years and age ranged from (25 to 45) in group B with statically   non-significant differences between two groups.
Keywords
Pupil dilation; predicted postoperative refraction; third- and fourth-generation calculation formulas
References
1-  Németh J, Fekete O, Pesztenlehrer N. Optical and ultrasound measurement of axial length and anterior chamber depth for intraocular lens power calculation. J Cataract Refract Surg. 2003;29(1):85–88.

2-  Rabsilber TM, Jepsen C, Auffarth GU, Holzer MP. Intraocular lens power calculation: clinical comparison of 2 optical biometry devices. J Cataract Refract Surg 2010;36(2):.

3-  Hoffer KJ. The Hoffer Q formula: a comparison of theoretic and regression formulas. J Cataract Refract Surg 1993;19:700–12.

4- Retzlaff, J. A, Sanders, D. R., & Kraff, M. C. Development of the SRK/T intraocular lens implant power calculation formula. Journal of Cataract & Refractive Surgery, 1990:16(3), 333–340. 

5-  Haigis W. The Haigis formula. In: Shammas H, editor. Intraocular Lens Power Calculations. Thorofare, NJ: Slack; 2004. Pp.41_57.

6-  Norrby S. Sources of error in intraocular lens power calculation.
J Cataract Refract Surg. 2008; 34: 368-376.

7-  Aristodemou P, Knox Cartwright NE, Sparrow JM, Johnston RL. Formula choice: Hoffer Q, Holladay 1, or SRK/T and refractive outcomes in 8108 eyes after cataract surgery with biometry by partial coherence interferometry. J Cataract Refract Surg. 2011; 37:63–71.

8-  Preussen PR, Olsen T, Hoffmann P, Findl O. Intraocular lens calculation accuracy limits in normal eyes. J Cataract Refract Surg. 2008; 34:802–808

9- Olsen T. Improved accuracy of intraocular lens power calculation with the Zeiss IOL Master. Acta Ophthalmol Scand. 2007; 85:84–87.

10-   KhambhiphantB,Chatbunchacha N,Pongpirul K .The effect of pupillary dilatation on IOL power measurement by using the IOL master . international ophthalmology .2015 Dec 1;35(6)853_9.

11- Hug D. Pediatric cataracts and lens anomalies. Nelson LB, Olitsky SE, eds. Harley's Pediatric Ophthalmology. 6th ed. Philadelphia, PA: Lippincott Williams & Wilkins; 2014: (11).

12-  Arriola_Villalobos P,Diaz_Valle D,Garzon N ,Ruiz_medrano J ,Fernandez_perez C ,Alejandre_Alba N ,Garcia_feijoo.Effect of pharmacological pupil dilation on OLCR optical biometry measurement for IOL Predictions .European journal of ophthalmology.2014 Jan;24(1);53_7.

13-  Hoffer K J .The Hoffer formula; a comparison of theoretical and regression formula .Journal of cataract and refraction surgery 1993 Nov 1;19(6);1913

14-  Rodriguez Raton A,Jimenez_Alvarez M,Arteche_LimousinL,Mediavilla_pena,Larrucea_Martinez 1.Effect of pupil dilation on biometry measurement with partial coherence interferometry and its effect on IOL power formula calculation .European journal of ophthalmology.2015Jul;25(4);309_14

15- Teshigawara T, Meguro A ,Mizuki N.Influnce of pupil dilation on predicted post operative refraction and recommended IOL to obtain target post oprative refraction by using third and fourth _generation calculation formulas. Clinical Ophthalmology (Auckland NZ).2018;12;1913.

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