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Home » What's New » Rx of Granular Corneal Dystrophy in the USA in 2015

Rx of Granular Corneal Dystrophy in the USA in 2015

Q by Doctor Randy:

Dear All,

I have not seen the patient yet, but was called by a colleague who wanted to refer a 55 year old patient with the above to me for “corneal laser treatment”. I asked of the patient had any ocular surface disease/recurrent erosions, and was told that the only problem was decreased acuity form the opacities themselves. No irregular astigmatism, no cataracts.

How would those of you advise those of us who only have access to “USA technology” to proceed to treat such a patient?

Thanks,

Randy

A by doctor Will:

Randy,

I have performed PTK on a handful of Granular Dystrophy patients who were experiencing reduced vision The problem in Granular Dystrophy is that the opacities are breaking through the anterior stromal surface. Removing the epithelium reveals a highly irregular surface

The goal with PTK is to just smooth out the surface, not eliminate opacities.

After smoothing out the stromal surface with PTK – patients will note improved vision – both on Snellen testing as well as report improved quality of vision

Following the PTK – There will be plenty of opacities remaining.

Overall – the PTK procedure should be a very superficial treatment. I have had one patient require a repeat PTK 6-7 years after the first treatment – and I expect that the PTK lasts for 5-10 years, depending on the patient. So focusing as much on corneal smoothing while preserving as much corneal tissue is key, in my opinion.

I hope this helps

Bill

Answer by Emil Chynn, MD:

When we treat granular dystrophy or scars, as long as there’s a significant refractive error, we try to treat that, too. Then the issue always arises re if abnormal tissue ablates at a faster or slower rate than normal cornea stroma

We (meaning myself and the various doctors who’ve worked with me) have concluded this is impossible to predict. So then we just shoot our normal nomogram. And have been pleasantly surprised that our refractive outcomes have come out close to plano

Regarding differential ablation rates and leaving bumps and lumps, if you employ a PRK nomogram and ablation profile, as long as your scars are mostly central and superficial, you wind up shaving off a substantial amount of the opacities. I’ve used many different agents to mask, and now there are dozens of tears out with varying viscosities. Unfortunately the predictability of outcomes when using any masking agent is lower than if you don’t use one.

Luckily as many of us have pointed out the epithelium can cover and mask a huge amount of surface irregularity. Therefore after myopic ablation, since you’re creating a “top hat” profile afterwards, it seems like the epithelium is more able to cover up the residual pathology than the original pathology, because the epithelium is going to try to recreate a more normal “dome” shape. There’s also epithelial hyperplasia, which can be encouraged with topical NSAIDs. So these are two often-ignored factors that contribute significantly to a smoother front refractive surface after PRK of opacities, even without using a masking agent in an attempt to differentially and preferably ablate scars or dystrophic deposits over normal stroma

No other laser vision correction surgeon in New York….

No other laser vision correction surgeon in New York....

...offers you the opportunity to have a Free Remote Consultation with the surgeon! Ask Dr. Chynn your main question or concern, and will answer, personally, within 2 business days!

Unsure whether you're a good candidate because of a lot of astigmatism? Large pupils? Dry eyes? Maybe you were rejected by LASIK surgeons due to a “thin cornea” or high prescription.

Take advantage of this incredible opportunity to find out if LASEK is an option for you from Dr. Chynn, our famous, cornea fellowship-trained, Columbia & Harvard graduate who’s in MENSA & was the 1st eye surgeon in NY, NJ, CT & PA to get LASIK, & has performed 1,000 PRKs, 5,000 LASIKs, 10,000 LASEKs, and 5,000 epiLASEKs

But please be considerate. Dr. Chynn gets paid $1,000/hour as a consultant for expert networks & expert witness, so please limit yourself to your most pressing question or concern, as he’s doing this for free on a trial basis to help interested patients.

Please include the information below in your email so Dr. Chynn can answer your question specifically.

Age:
Approximate prescription (if known):
Occupation (the more specific the better):
Main barrier or concern:

  • This field is for validation purposes and should be left unchanged.

Tell Dr. Chynn your main barrier so he can help overcome it😉👌

Email us at dr@ParkAvenueLASEK.com
Text us at (212) 691-4221

Contact Dr. Chynn

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Tell Dr. Chynn your main barrier so he can help overcome it😉👌 Email us at dr@ParkAvenueLASEK.com Text us at (212) 691-4221

No other laser vision correction surgeon in New York….

No other laser vision correction surgeon in New York....

...offers you the opportunity to have a Free Remote Consultation with the surgeon! Ask Dr. Chynn your main question or concern, and will answer, personally, within 2 business days!

Unsure whether you're a good candidate because of a lot of astigmatism? Large pupils? Dry eyes? Maybe you were rejected by LASIK surgeons due to a “thin cornea” or high prescription.

Take advantage of this incredible opportunity to find out if LASEK is an option for you from Dr. Chynn, our famous, cornea fellowship-trained, Columbia & Harvard graduate who’s in MENSA & was the 1st eye surgeon in NY, NJ, CT & PA to get LASIK, & has performed 1,000 PRKs, 5,000 LASIKs, 10,000 LASEKs, and 5,000 epiLASEKs

But please be considerate. Dr. Chynn gets paid $1,000/hour as a consultant for expert networks & expert witness, so please limit yourself to your most pressing question or concern, as he’s doing this for free on a trial basis to help interested patients.

Please include the information below in your email so Dr. Chynn can answer your question specifically.

Age:
Approximate prescription (if known):
Occupation (the more specific the better):
Main barrier or concern:

  • This field is for validation purposes and should be left unchanged.