The Tecnis lens that Dr. Hagan referred to is an aspheric monofocal IOL. Go to www.tecnisiol.com and check out the patient education video; it's quite interesting and informative. I believe that the Tecnis lens comes in both acrylic and silicone.
Is the TECNIS® IOL a monofocal or multifocal IOL? I am not sure what aspheric means? Does that refer to shape of the lens or to it being a monofocal or multifocal lens? My cataract doctor blames tha dark arch in my side vision on the fact that the lens I have in my left eye has square edges that is fitting into a round area. The corner of the lens fold back on it's self forming the arch.
Both silicone and acrylic IOLs are excellent and neither material is clearly superior than the other. Any and almost all IOLs can have glare, arching, halos, flaring etc after cataract surgery. Most of these symptoms get better with time. I don't think its fair to say that silicone is less likely to cause the problems but a different IOL in your case may be a good idea. If you ever had a retinal detachment and needed silicone oil to help in the repair it may damage your silicone IOL but not the acrylic IOL.
There are three aspheric IOLs on the market by B+L, AMO and Alcon to reduce your problems. Our practice uses the Technis IOL with good success.
Your glaucoma is a much bigger threat to your vision than the type of IOL. You should be under the ongoing care of an Eye MD that does glucoma. You need a full work up: visual field, Optic nerve OCT, gonioscopy, optic nerve photographs, corneal central thickness measurement and frequent IOP meansurments (each 3-4 months).
If I were having cataract surgery done on me I would chose a Technis IOL.
JCH III MD