Exposing the LASIK Scam

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 Post subject: Binocular visual performance after LASIK
PostPosted: Mon Oct 09, 2006 4:41 pm 
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Binocular visual performance after LASIK.
J Refract Surg. 2006 Sep;22(7):679-88.

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=pubmed&cmd=Retrieve&dopt=AbstractPlus&list_uids=16995550&query_hl=1&itool=pubmed_docsum

Jimenez JR, Villa C, Anera RG, Gutierrez R, del Barco LJ.
Laboratorio de Ciencias de la Vision y Aplicaciones, Departamento de Optica, Facultad de Ciencias, Universidad de Granada, Granada, Spain. jrjimene@ugr.es

PURPOSE: To analyze binocular visual function after LASIK.

METHODS: Eye aberrometry and corneal topography was obtained for both eyes in 68 patients (136 eyes). To evaluate visual performance, monocular and binocular contrast sensitivity function and disturbance index for quantifying halos were measured. Tests were performed under mesopic conditions.

RESULTS: Binocular summation and disturbance index diminished significantly (P<.0001) after LASIK with increasing interocular differences in corneal and eye aberrations. Binocular visual deterioration was greater than monocular deterioration for contrast sensitivity function and disturbance index.

CONCLUSIONS: Binocular function deteriorates more than monocular function after LASIK. This deterioration increases as the interocular differences in aberrations and corneal shape increase. Improvements in ablation algorithms should minimize these interocular differences.


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 Post subject: Comment on Binocular visual performance after LASIK
PostPosted: Mon Oct 09, 2006 4:57 pm 
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From: Binocular visual performance after LASIK.
J Refract Surg. 2006 Sep;22(7):679-88.
Quote:
Improvements in ablation algorithms should minimize these interocular differences.


Comment

Improved ablation algorithms??? The response of the cornea to laser eye surgery varies among individuals. There is no way an ablation algorithm can account for the complex biology involved between the response of the cornea of each individual to laser injury and visual outcome.

Wake up and smell the burning tissue.


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 Post subject:
PostPosted: Wed Jun 04, 2008 1:52 pm 
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J Opt Soc Am A Opt Image Sci Vis. 2008 Jun;25(6):1227-31.

Upper disparity limit after LASIK.
Jim?nez JR, Castro JJ, Hita E, Anera RG.

We evaluate the effect of the emmetropization technique LASIK (laser-assisted in situ keratomileusis) on stereoscopic vision. For this, we used a mirror stereoscope to measure the upper disparity limit D(max) before (with best correction) and after LASIK for 30 patients. The results show that the upper disparity limit declines from 41.1min of arc on average to 31.3min of arc after LASIK, being significant in 83% of the patients. This deterioration is significantly correlated with an increase in the postsurgical interocular differences in higher-order aberrations, corneal asphericity, and presurgical anisometropia. New ablation algorithms should minimize interocular differences in order to improve binocular visual performance.

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