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Crystalens HD Available Powers
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Crystalens HD Available Powers

The new Crystalens HD has the following specifications listed on their site:

Available Powers
4 to 10 D in 1-D steps (only available in Five-O)
10 to 33 D in 0.5-D steps

My contact lens prescription is -9.00 / -9.50.  What does that translate into IOL powers? Am I outside the range of the latest Crystalens?

TIA
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7 Comments Post a Comment
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IOL power is determined by plugging your eye measurements into a complicated formula.  It doesn't correspond to your contact lens script.  But I'm sure that you're in the range for one of the Crystalens models.
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there was an article I found online, a few months ago, I think it was in Review of Optometry, which said that the Crystalens (model available at that time) could reliably correct myopia up to -9.00

the previous Crystalens, the AT-50, came in powers from 4 to 16.75 diopters. Dr Hagan or your surgeon would have to tell you if the higher number diopters in the new HD would correct a higher degree of myopia, I don't know
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Avatar_m_tn
I' need Cataract surgery on both eyes .
I' was told because my near sidedness I'm might be having  RetIna Detachment. RD

I'can not get any stronger glasses for my driving .

Is anyone out their who faces the same scenario ?



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I had a Crystalens HD "installed" on 8/12/08.  My Crystalens power was 13.5 with the objective of attaining a -1.00 after surgery.  My contact lens prescription pre-op was in the neighborhood of -3.5.  My doctor had a very detailed calculation from which he compared readings from certain measuring devices, and also my objective to creat a mini-mono vision leaving this eye corrected to a -1.00 when all was said and done.  My guess is that your eyes will fall in the range of the lenses available.

I'm having my second eye done in about 2 weeks and that Crystalens will be a 14.0 if I recall correctly, with the objective of seeing plano.

There is some variability and sujectivity in the final decision as to what lens power is used.  Be sure that you are working with a doctor who does the lens of your choice regularly.  I sought out an expert, and left my regular opthamologist behind as he wasn't well versed in Crystalens, and I wanted it done to the best possible outcome for obvious reasons.
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You are very close to the borderline. I had a Crystalens HD implanted in my left eye on 7/15/08. The MD deliberately targeted my left (nondominant) eye for about -1.0D and that is how I ended up. The contact lens prescription in my left eye prior to surgery was minus 9.0D. He used a Crystalens HD 10 to do that (strongest available Crystalens HD).  He intended to use a stronger Crystalens HD (probably about a 8.5 or a 9) in my right (dominant) eye but he did not realize until he tried to order the Crystalens HD for the right eye that it was not available in the correct power. He wanted me to wait for the Crystalens HD to become available in the correct power to get me to plano in the right eye. I nixed the idea because the only way I could have any form of balanced vison was to wear a contact in my right eye almost full time while waiting for who knows how long for the correct power to become available. I told him to put an aspheric monofocal lens in the right eye with a target of plano. It has worked out pretty well for me. He used a 8.5 power aspheric monofocal B&L lens in the right eye and my distance vision in that eye is -.25D which is what he targeted for that eye. I therefore have excellent distance vision in the right eye post surgery. Prior to surgery my contact lens prescription for the right eye was -8.0D. With the left eye at -1.0D  have excellent intermediate vision and decent near vision. I seldom wear reading glasses.

As someone else pointed out here you cannot use your contact lens prescription and translate that to an IOL power. The correct IOL power is determined from eye measurements. However I would guess that with a contact lens power of -9.0 you would probably not get to plano with the Crystalens HD because it does not come in a strong enough power at the present time. This is a long answer to your question.

The short answer is yes....you are probably outside the range of the Crystalens HD as it is available currently.
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How is your vision of your eyes after the crystalens HD surgeries?

I had have crystalens HD in my left eye but I still need glasses for reading.  My surgeon says it needs half year for full vision.

ave11
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Avatar_m_tn
My Crystalens HD is 12.5D and was targeted at -.25D, achieving plano.  It was implanted about 9 weeks ago.  I get excellent vision from the computer monitor (2 ft) and farher with no glasses.  I need readers for news print.
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