New member with a few questions

[jayuk]

Guess it depends Andrew on few things

- how well they have been fitted
- steepness of cone
- bearing on the cornea
- how sensitive your eyes are to the larger material and its relative Dk values

I am led to believe that the more steep and advanced the cornea, the less producive larger lenses are in terms of vision ; excluding Sclerals....but their all worth a go the more advanced the KC gets...anything to delay the Slicing and Dicing!..thats what I say!

J

[Sweet]

I get more wear time as well as it is more comfortable. It doesn't feel as tight as my smaller one and when i blink i don't get the sudden sharp pain i used to occasionally get before!

I think though that it it all down to fit and not just in being a larger lens, everyone is different and it's a personal choice.

Sweet X x X

[Andrew MacLean]

I am led to believe that the more steep and advanced the cornea, the less producive larger lenses are in terms of vision ; excluding Sclerals....but their all worth a go the more advanced the KC gets...anything to delay the Slicing and Dicing!..thats what I say!
J

that's more or less what I've been told, too. And, I agree, the slice and dice is best left until after the 11th hour!

Andrew

[SebastianRys]

Do you guys get steady vision with your RGP's because like I said before my changes after I blink, as the lens slides down? Now I read somewhere the contact optical zone is 1.0 to 1.5 mm smaller than the overall lens diameter. Taking this into consideration I think my lens slides down to low, what I mean is I don’t think the optical zone of the contact covers my entire pupil which I guess would cause that halo I see at night and a decrease in my vision as the lens slides down. Also I notice my vision improves after I physically press the contact against my cornea for a few seconds which only last for about 30 seconds and then it seems the contact releases its suction and my vision slightly degrades. What could be done for a tighter fit that presses firmer against the cornea for a flatter cone and stop the contact from falling to low? I guess a bigger diameter will give you a tighter fit but will this also keep the contact from falling down to low? Also should I tell my optician to give me a flatter base curve as this would simulate the pressing down of my cornea with my fingers? Anyone want to comment?

[jayuk]

Seb

The optical zone and the KC Cone have a lot in common if you want to get the best possible vision! However there is always a trade off between comfort and vision!

Rose K2 lenses work on a smaller optical zone if memory serves me correct and thus thats how the lens can provide sharper vision in medium / advanced cases of KC....

the following is a very good explanation of the lens on advanced KC cases

from RoseK

However with keratoconus patients to achieve optimum alignment with the cornea, many curves are required on the back surface of the lens and often adjacent curves are very different. In steeper cones particularly, several curves are often required within the patient's pupil zone to achieve a good fit over the central area of the lens. Unfortunately each one of these curves gives rise to a slightly different focal point at the back of the eye. This causes the patient to experience ghosting around the object that they are viewing (like a TV with a poor reception) and this is worse the bigger the pupil is because more curves on the back surface of the lens come within the patient's pupil zone. Therefore night driving where the pupil is larger is very difficult for keratoconus patients. These multiple focuses are called aberrations.

[Andrew MacLean]

Seb

it may just be that you have highly viscose tears, and that the effect of blinking is that you levae a smear on the lens. I had this problem and it was not mittigated by my habit of not completing my blink. I'd almost close my eye, but not quite, so that a film of tear built up exactly where I wanted to look through the lens.

I had to develop a conscious habit of completing my blink every time, or at least oncde in every so many cycles.

Andrew

[SebastianRys]

I just wish I could get the C3R treatment, and intact rings and get away with glasses. How many here have intacs and are happy with the results, because I am seriosuly considering this as my next option. I emailed the place in Dresden, Germany to schedule an appointment for the treatment but I still got no response back. Did anyone email them before and have to wait a long time for a response?

[jayuk]

Seb

It may take a few days

If you are going to haver Intacs and C3R you may want to also take a look at Dr Swanson....he is highly regarded and is based in Mexico

J

[SebastianRys]

I did try to contact Dr. Swanson. He actually was number 1 on my list but after many phone calls and the only voice on the other side I was getting was "the mailbox is full please try your call later" I gave up. I also went to his website and tried to email him a few times with no response back. I also just got a response from Dresden and pretty much they said it would be better if I would do it locally here in the U.S. and gave me a list of contacts more local. I guess they are not aware, that here in the states its like 7 thousand US dollars for both eyes. He also said "To decide, whether your keratoconus is in a stage that would be indicated for this crosslinking treatment, we have to see topographies and pachymetries of your corneas in last few years." few years, I thought the purpose of this treatment is to hault its progression ASAP, not wait over 2 years. I have topographies and pachymetries from 4 months ago, but thats about it. Now what do I do. It seems like everywhere I try I reach a dead end.

[jayuk]

Seb

You can reply to them and say that you have the topographies and to email them...I am sure they will still proceed; from what I know of them. I woudl suspect that they are tryign to save you money and hassle....without knowing how much it costs out there.....

I would reply to them on that basis and see what they say...

J