May 2008
Volume 49, Issue 13
Free
ARVO Annual Meeting Abstract  |   May 2008
Contralateral Comparison of WASCA versus Iris Recognition Guided WASCA Using MEL80 Excimer Laser System
Author Affiliations & Notes
  • F. Wu
    Ophthalmology, the second Hospital Affiliated to Zhejiang University, Hangzhou, China
  • Y. Yang
    Ophthalmology, the second Hospital Affiliated to Zhejiang University, Hangzhou, China
  • Footnotes
    Commercial Relationships  F. Wu, None; Y. Yang, None.
  • Footnotes
    Support  None.
Investigative Ophthalmology & Visual Science May 2008, Vol.49, 5642. doi:
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    • Get Citation

      F. Wu, Y. Yang; Contralateral Comparison of WASCA versus Iris Recognition Guided WASCA Using MEL80 Excimer Laser System. Invest. Ophthalmol. Vis. Sci. 2008;49(13):5642.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract
 
Purpose:
 

To verify whether there is any difference in visual outcomeafter performing WASCA (wavefront supported corneal ablation)and iris recognition guided WASCA (IR-WASCA) of the same patient3 month after surgery.

 
Methods:
 

This was a prospective randomized study of 104 myopic eyes (52patients) that had LASIK using the MEL80 excimer laser system.IR-WASCA was used in the first eye of the patient (study group)and the other eye of the same patient was operated with WASCAsurgery (control group). Mean refractive error was similar betweenleft and right eyes of the same patient. Higher order aberration(HOAs),Contrast sensitivity function(CSF), UCVA and BCVA were recordedpreoperative and 1-month, 3-month postoperative. Corneal topographicmaps were performed preoperative and 3-month postoperative.

 
Results:
 

The mean cyclorotation of IR-WASCA group was -2.0+/-4.2 degree(rang-11.2~7.9 degree). At 3 month after surgery, UCVA was 20/20or better in 96.2% of IR-WASCA group and 90.3% of WASCA group.A significant difference in CSF was found between the two groupsat 2.5, 1.6, 1.0 degree.

 
Conclusions:
 

IR-WASCA provides a better quality of vision as they detectand compensate cyclorotation to give a more precise ablationprofile.  

  

 
Keywords: contrast sensitivity • iris • refractive surgery: comparative studies 
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