LASIK correction for presbyopia

Dr Oyakawa,
I 've been to the web pages of many LASIK clinics and they offer service of LASIK correction for presbyopia. A few of them claimed offering an advance service called "Blended mono-vision". The most attractive thing is that this Lasik claims be able to increase the depth of focus of each eye but didn't mention how. As I am going to do a cataract surgery on my RD eye and very likely to implant a monofocal IOL. It sounds attractive to have some technology to increase the depth of focus on that eye.

I also read some other articles talking about some advance calculation of different parameters like spherical aberration can help the LASIK to improve depth of focus.
Do you know how much the depth of focus can be increased by this "Blended mono-vision Lasik" and what is the magic behind that ? How long has this service been available ?

[Ray T Oyakawa, MD]

Blended monovision has less depth perception compared to both eyes set at the same distance.

Dr. O.

[taurus1203]

Dr Oyakawa,
That 's exactly my question. Setting monovision means one of the eyes will not be clear and this will definitely lose depth perception (I cut from the description from Sharp vision center web).

There are many places mentioned that the depth of focus can be some how increased by some during this 'blended monovision' surgery. Is there such a magic that the new technology can compensate for that  ? Or I just misintepreted.

Thanks a lot

[Ray T Oyakawa, MD]

I do not think it is possible.  As I mentioned before you should get a book on optics.  You will waste your time looking on the web without the medical background.

Dr. O.

[taurus1203]

Dr Oyakawa,
I will definitely take your advice to get a book to have more optics fundamental knowledge.
However, this scenario is a bit special. A few clinics announced this is the latest technology and not many clinics in the world offer this service currently.  With my current level of knowledge in optics (almost nothing), I doubt I can understand the detail behind even I spend a year on it.
To be a consumer, I just want to know a bit more about how mature is this technology in order to consider if I want to have it in the near future. Have you used or heard about this technology ? Thanks

This is the description of that Blended Lasik :
" in traditional Laser monovision, the depth of field is not increased, which means there is no blended zone. This result in creating a gap of blurred vision ....
In Laser-Blended vision, laser refractive surgery is used to correct the dominant eye for distance and the non-dominant eye for close vision while the depth of field of each eye is increased. As a result, the brain ..."

[Ray T Oyakawa, MD]

You would be better off with a Crystalens.

Dr. O.

[taurus1203]

Dr Oyakawa,
You are right. I will raise the option Crystalens when I meet my surgeon again.
Thanks