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I'll await your response.
it's for my son he has a bad reaction to the silicone lenses.
He has tried many different types and they are all uncomfortable. Sorry I don't remember all the names - one of the worst was accuvue oasys for astigmatism. Caused awful irritation...poor guy stuck it out because the optometrist told him that the longer he wears them the more he'll get used to them. But I had to get him to take them out because his eyes were bloodshot and painful.
I don't understand this new trend of 'having to become accustomed' to soft lenses. He never seems to 'get used' to them.
This has been going on for a couple of years.We thought we'd give it one more shot before we give up.
I am working with a new optometrist and she wants to try lenses without the silicone. He tried some dailies and they were ok but still very difficult to tolerate as they felt dry after 4 hours. But at least they didn't cause the extreme eye irritation that others have in the past. She has ordered 3 non silicon toric lenses but says she doesn't know what else might be available.I said I'd make some enquiries to see if I could find the name of other non-silicone toric lenses. And that is the reason for my question here.
Also the contact lens RX question is just a general one - I can't remember if the RX specifies the brand or not.
If its easier, perhaps you can give me a list of what materials to look out for because when I do a search on contact lenses and look at the details not one of them uses the word "silicone hydrogel" so it's impossible for me to ascertain those that don't have it!
EG 62% polymer (Senofilcon A). is the details given for Acuvue Oasys for Astigmatism which I'm told contains the problem substance. But it seems these 'new' substances are given different names by different manufacturers??? Is that correct?
I basically need a list of the OLD STYLE lenses because I've talked to a lot of people who couldn't tolerate the new style and were absolutely fine with old style. So in desperation I thought I'd suggest this to the doctor.
I suppose the perfect lens to try would be Toric, high water content, dailies containing zero amount of the lets call it "new materials" !!! lol but I doubt such a beast exists??....
The last trial he completed last week was with the focus dailies Toric. I was told that these lenses have 'no' (zero) silicone but then was told they have 'low' silicone so I have no idea which is correct - do you know?
The dailies weren't bad but he suffered from dry eyes after 2 hours and after 4 hours the dryness was such that he simply had to take them out. the Blink lubricating drops didn't help.
So that's where I'm at with this. I hear stories of people suddenly finding that one perfect lens that feels comfortable and I so much want this for my son if it's possible!
I hadn't done this before but I just googled Senofilcon and came across these tables which seem to contain the information I was seeking. Here's the link # XXXXX http://www.siliconehydrogels.org/editorials/index_july.asp but it's a pretty old report (2004)
Yes I do still have questions numbered 1 thru 8 .
"I don't know" is an acceptable answer.
1. Focus Dailies Toric contain senofilcon. And senofilcon is a Silicone Hydrogel Material. So do they or don't they contain silicone?? (remember my Optometrist told me they contained ZERO silicone)
2. I also came across this study
Link 2: http://www.markennovy.com/en/pdf/Hydrogel_vs_silicone_hydrogel_GC44.pdf
which seems to confirm the problems that my son has been having with silicone material. It seems to conclue that silicone lenses are inferior to the other hydrogel materials listed when it comes to "wettability" and "Mechanical abrasion". And that there are increased complications with silicone which has a "2.5 times higher incidence of non-severe keratitis" than non-silicone materials. Concluding also that this "high oxygen" that all the optometrists have spoken to me about might "lead to a range of undesirable performance characteristics.
Is my understanding of the conclusions of this report correct? Is it a reliable report?
3. What's this hioxifilcon material that is mentioned in the report at link 2? Maybe this could be the magic lens my son needs? I did a site search at 1800 contacts and came up with Extreme H2O 54% Toric. Why doesn't your list include these? Do you know anything about these lenses?
4. What's the difference between Extreme h20 MC and LC?
5. Can you comment on any of the other non-silicone materials mentioned in the report at link 2 as it pertains to my son's search for comfortable lenses? .
6. Why has the FIRST lens that my son has been given to try with the last 4 optometrists ALWAYS been an Acuvue lens?
7. If you were me and knowing my son's difficulties with contact lense discomfort and his need for toric lenses, what are the top 3 Brands that you suggest he tries? Please specify entire full brand name (e.g please don't just say "Acuvue" because there are so many different types of Acuvue) whether they are daily, bi weekly etc, and also the material they are made from. (e.g. Hioxifilcon etc)
8. Do you have any other thoughts/recommendations concerning this whole situation?