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Does dysphotopsia come more often with IOL with square edge ?


I heard many ones raise the question if dysphotopsia come more often with IOL with square edge ?
Is there any research or survey done on what type of IOL (e.g. multifocal or material) can higher rate of dysphotopsia  ? Does a IOL with bigger optics will have less chance of dysphotopsia.
As I know the Tecnis Aspheric one and the AcrySof IQ also have the square edge design.
Did they think that dysphotopsia  is not related to square edge design  ?

My side vision is a very blur (a little weir) and I guess this may due to the light is dispersed by the cataract. I am worried I have another problem like dysphotopsia after the cataract surgery.

Thanks
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711220 tn?1251891127
MEDICAL PROFESSIONAL
Dr. Sam Masket presented his theory of dysphotopsia.  You can probably Google it.  It was presented at ASCRS in the Spring in Boston.  

Yes, square edge IOL do have more dysphotopsia.  It seems to occur more with arcylic than silicone IOLs.  I believe that Tecnis has a square posterior edge (to decrease PC haze) and a rounded anterior edge to decrease dysphotopsia.  

Dr. O.
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Avatar universal
Dr Oyakawa,
Thanks a lot, I will do some research on this.
How about the AcrySof IOL ? Are there a lot of complaints about dysphotopsia ?
I think dysphotopsia is quite an important factor to me.
If there is PC haze, we can do a YAG to fix it but this is difficult to fix dysphotopsia except ignoring it.
I am seriously bothered by the very blur side image  for 10 months and I found this is quite difficult to ignore it. I hope this is just because the effect of cataract and I really want to minimize the risk of running into the problem of dysphotopsia.

Thanks again
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