Wrong Lens - Can't see!

by Col
(USA)

I had a cataract removed recently and can't see clearly beyond 10 inches. What can be done?

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Jan 19, 2013
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Re: Wrong lens
by: Brian Ang

A refractive error of -0.75D just means that you need to wear spectacles or contact lens of -0.75D to achieve a vision of 20/20.

It depends on what your expectations are going into the operation. Cataract surgery is not like laser vision correction.

The aim of cataract surgery is to remove the cataract and to replace the cataractous lens with a clear synthetic lens in order to improve vision. It is not to make vision free from refractive error, although there are techniques available to minimize refractive error. If the refractive error is reduced to 0, then that's a big bonus. Often, there will be a residual refractive error of up to -1D. This does not mean that surgery has been unsuccessful or you have had a poor outcome. You still have had a successful outcome because with wearing the appropriate prescription, you can still achieve 20/20 vision provided the rest of your eye is healthy.

On the other hand, the aim of laser vision correction is to reshape your cornea so that you can achieve 20/20 vision without having to wear spectacles or contact lenses. In this scenario, then having a postoperative refractive error of -0.75D can be considered suboptimal.

Kind regards,
Brian Ang
www.vision-and-eye-health.com

Jan 16, 2013
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Wrong Lens?
by: Eric

Thank you Brian for your response.

You said: "Under most circumstances, a reduction of refractive error from -6D to -0.75D can be considered a pretty good result." However, to me, and to all cataract patients, it doesn't seem to be good enough.

Under normal cataract surgery procedure and granted a patient with healthy eye (except cataract), what prevented from achieving a perfect vision of 20/20?

Thanks.

Eric



Jan 06, 2013
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Re: Wrong lens
by: Brian Ang

The insertion of the wrong intraocular lens can be distressing. In general, this can be corrected with either contact lenses or spectacles. Sometimes, further intraocular surgery can be performed - either the lens is removed and replaced with the correct intraocular lens, or a 'piggyback' lens is placed over the previous lens. Another alternative is having laser vision correction.

There is no right or wrong approach - just the approach that suits you the best. Sometimes, one does have to be realistic in terms of what you hope to achieve with surgery. Under most circumstances, a reduction of refractive error from -6D to -0.75D can be considered a pretty good result.

Kind regards,
Brian
www.vision-and-eye-health.com

Jan 03, 2013
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post cataract - can't see
by: Anonymous

My doctor put in a toric lens, it wouldn't fit right and he had to remove it and replace it with a non-toric lens. I still don't see well but they claim to be able to fix it with laser in February. We'll see.

Jan 03, 2013
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Wrong Lens
by: Anonymous

Wrong lens was also implanted on my right eye. Measurements of the implanted lens is different from that taken by the doctor. Instead of Length: 23mm and Optic: 6.3mm, the implanted one is 13mm and 6.0mm. Power of the lens is calculated based on the measurement. Instead of not having to wear glasses at all, I was given a prescription of -0.75, before surgery it was -6.0.

Is there any postoperative remedial or corrective measures that can be taken?

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