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

Wang - Koch - Maloney Method.1

The Modified Maloney Method of post-LASIK corneal power estimation was originally described by the well-known refractive surgeon Robert Maloney and subsequently modified by Doug Koch and Li Wang.

The advantage of this method is that it requires no historical data and has been reported to have a low variance when used with either the Holliday 2 formula or a 2-variable formula combined with an Aramberri double K method correction nomogram published by Koch and Wang.1

Using this technique, the central corneal power is estimated by placing the cursor at the exact center of the Axial Map of the Zeiss Humphrey Atlas topographer. This value is then converted back to the anterior corneal power by multiplying the Axial Map central topographic corneal power by 376.0/337.5, which is the same as 1.114. An assumed posterior corneal power of 6.1 D is then subtracted from this product.

(CCP x 1.114) - 6.1 = Post-LASIK adjusted corneal power Cataract Surgery ArizonaWhere...

 CCP = the corneal power with the cursor in the center of the Axial Map Cataract Surgery Arizona of the Zeiss Humphrey Atlas topographer.

The Modified Maloney method for the right eye following LASIK is carried out as follows:

 

If the Axial Map central corneal power is 40.91 D, then...

  (CCP x 1.114)   -   6.1   =   Post-LASIK adjusted corneal power
           
  (40.91 D x 1.114)   -   6.1   =   39.47 D

 

The Modified Maloney method for the left eye following LASIK is carried out as follows:

 

If the Axial Map central corneal power is 41.36 D, then...

  (CCP x 1.114)   -   6.1   =   Post-LASIK adjusted corneal power
           
  (41.36 D x 1.114)   -   6.1   =   39.98 D

References

1. Wang L, Booth MA, Koch DD. Comparison of intraocular lens power calculations methods in eyes that have undergone LASIK. Ophthalmology 2004 111(10) 1825-1831.

 


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.