IOL without magnification
Posted , 3 users are following.
Prior to Corneal transplant I had mild astigmatism in R eye. And L/R eyes were around lets just say +2.5d correction with glasses or contacts. Giving me good distance.
I had an undiagnosed fungal infection in right eye and so much damage was done before they figured it out, I had to have a corneal transplant to save the eye. The trauma also caused a severe cataract. So here 1.5 years later, theres a bad cataract, and I have to get another corneal transplant, because the astigmatism is massive (+10d). So surgeon will do another transplant plus an IOL for the cataract. Meanwhile my left eye has a pretty bad cataract too. So Plan is January get my R eye fixed (transplant and IOL), and end of the year an IOL in left eye for the cataract.
My question here, is I asked Dr, if we should for fixing R eye, do an IOL with +2.5 correction, since doing left eye later as well (thus both eyes at +2.5). His response was to do no magnification which is puzzling.
Thoughts?
0 likes, 6 replies
RonAKA jp1957
Posted
I am not totally sure if I am following what you are saying. Do you currently have hyperopia (farsighted), and use eyeglasses with a +x.xx correction? This would mean without glasses you can't see close up or far very well.
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If that is the case I don't see why you would want that when both eyes have cataract surgery with an IOL. As far as I know there are no advantages, only disadvantages to having hyperopia.
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On the other hand if you are near sighted (myopia) then you can see close up without glasses but not in the distance. Some people chose to be left with that situation with their IOL, with something like a -2.5 D residual. That lets them read without glasses, but they need glasses for distance. The majority however target plano or just under with a -.25 D target. As my surgeon says, nobody ever thanks me for leaving them with a +D residual. They target to be just under.
jp1957 RonAKA
Edited
I cant see up close nor distance . Distance requires appx +2.5 which puts me at 20/20 easily. To read, I have to add +1.5 to read. I'm quite happy with this. I need the cheaters for with 3ft. So basically within arms length.
Which is why I'm confused the surgeon doesnt want to add any magnification to my IOL. Which means even after surgery, I still need to wear glasses for distance and reading. Nothing has changed
RonAKA jp1957
Posted
It sounds like you are farsighted then. That is the worst of all worlds in vision. You do not want to put in an IOL that makes you far sighted. Most people with a monofocal IOL lens will simply correct for distance, and as I said before the target is to be slightly under, meaning you are left with a very small amount of myopia, of about -.25 D. When corrected that way you will see very well in the distance (20/20 or possibly better) and probably down to about 2 feet with no glasses. Yes, to read you will need reading glasses cheaters. The other option is to get progressive prescription glasses. This will give you good reading, intermediate (that cheaters don't do a good job of), and distance. Any residual astigmatism or cylinder can be corrected with the lenses as well. Prescription eyeglass lenses come in 0.25 D increments which is finer steps than an IOL.
jp1957 RonAKA
Posted
yes, that where I'm confused by the surgeon not wanting my previous RX. If they put in an IOL corrected for distance, I wouldnt need glasses for distance, just reading.
RonAKA jp1957
Posted
I think you may be just having a miscommunication with your surgeon. Think of it this way. The intraocular lens has to replace the power of the normal lens, and then correct for any error in the cornea. Because you are replacing the natural lens any error that is in that lens is gone. You only have to correct for error in the cornea. The lens power with no correction for the cornea (a perfect cornea) is in the range of -17 D, if I remember correctly. If there is error in the cornea then they adjust that up and down to correct for it. This IOL power has no real relation to your eyeglass power.
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I would keep the discussion simple with the surgeon. Just tell him/her that you want to see distance with 20/20 vision and no eyeglasses. They will figure out the correct power of the IOL to do that. It is not simple, and with a cornea replacement it will be even more complex. That is why they get paid the big bucks!
jp1957 RonAKA
Posted
As I'm reading their response, there are just too many variables with the transplant and lens replacement, suture removal, etc so they are just replacing lens with no magnification. As sutures are removed, etc. Like 3-12month to stabilize. Then review. I guess in reality, I have to pump my RX every 2 years abit anyways, so even with a correction in the IOL, its probably only good for 2-4 years anyways, before needing glasses to correct again.