Eye Doctor Arizona
Eye Surgery Arizona

  IOL Power Calculations
Post Myopic LASIK
printable version
 
IOL Power Calculations IOL Power Calculations
Post Keratorefractive Surgery Cataract Surgery Arizona
Myopic LASIK
Clinical History Method
Contact Lens Method
Corneal Bypass Method
Feiz-Mannis Method
Haigis-L Formula - Myopic
Latkany Method
Masket Method
Modified Masket Method
Topographic Central Power
Wang Koch Maloney Method
Hyperopic LASIK Cataract Surgery Arizona
Radial Keratotomy
RK + Hyperopic LASIK
"Double K" Formula Corrections
Hoffer Q Formula
Holladay 1 Formula
SRK/T Formula
Post Keratorefractive Calculator
Optical Biometry Optical Biometry
Disclaimer
Physician Downloads SIA Calculator
Links
References
Special Thanks

Corneal Bypass Method.1

The Corneal Bypass Method of post-LASIK corneal power estimation is one that was recently described by Walter et al in the March, 2006 issue of the Journal of Cataract and Refractive Surgery. The advantage of this method is that it is done without having to calculate the post-LASIK corneal power.

Using this technique, the IOL power is calculated using the post-LASIK axial length and the pre-LASIK keratometry. The target refraction is set for the pre-LASIK spherical equivalent. This "bypasses" the post-LASIK corneal power.

The corneal bypass method for the right eye would be carried out as follows using the post-LASIK axial length:

 

If the pre-LASIK keratometry was 45.37 D / 46.00 D, and...

The spherical equivalent before LASIK was -5.62 D, and...

The post-LASIK IOLMaster axial length is 26.32 mm, then...

The IOL power for a -5.62 D refractive result would be +17.27 D

The corneal bypass method for the left eye would be carried out as follows using the post-LASIK axial length:

 

If the pre-LASIK keratometry was 45.25 D / 46.12 D, and...

The spherical equivalent before LASIK was -5.12 D, and...

The post-LASIK IOLMaster axial length is 25.95 mm, then...

The IOL power for a -5.12 D refractive result would be +17.86 D

References

1. Walter KA, Gagnon MR, Hoopes PC, Dickenson PJ. Accurate intraocular lens power calculation after myoic laser in sitiu keratomileusis bypassing corneal power. J Cataract Refract Surg 2006 32 (3) 425 - 429.

 


IOLMaster Help
TOP

IOL Power Calculations After Myopic LASIK

IOL Power Calculations After Keratorefractive Surgery

Intraocular Lens Power Calculations


East Valley Ophthalmology
5620 East Broadway Road
Mesa, Arizona 85206

Tel: +1-480-981-6111
FAX: +1-480-985-2426

Arizona's Top Eye Doctors - East Valley Ophthalmology provides this online information for educational and communication purposes only and it should not be construed as personal medical advice. Information published on this website is not intended to replace, supplant, or augment a consultation with an eye care professional regarding the viewer/user's own medical care. East Valley Ophthalmology's disclaims any and all liability for injury or other damages that could result from use of the information obtained from this site. Please read our full Terms, Privacy, Infringement

Eye Doctors for Mesa, Gilbert, Chandler, AZ and surrounding areas.

A few of our featured topics:


TOP

Copyright East Valley Ophthalmology. All rights reserved.