Talk:Intraocular lens
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[edit] Materials Confusion
This article commonly makes notations about PMMA and acrylic lenses, describing the two as entirely different materials. In fact, these 'two' materials are both the same thing - PMMA stands for polymethyl methacrylate, most commonly known as plexiglas, perspex, acrylic glass, or acrylic. Any other materials considered as 'acrylic' are unsuitable for the task - acrylic fiber appears white due to its highly refractive nature as a fiber and its impurities, whereas pure acryls by themselves are too reactive to be included as an implant material (They contain two double bonds, which are subject to easily being broken by free radicals and various components of one's body.). It is strongly suggested that the corrections be made. See the Acrylic glass article and the Acrylic disambiguation for more detailed information. Xander T. 03:08, 11 March 2007 (UTC)
- I agree with the above post completely. The section is very confusing and poorly organized. I have added the expand section tag to the article and moved this section of the discussion to the top of this discussion page. Garvin (talk) 01:57, 22 February 2008 (UTC)
The crystalens stuff reads like an advertisement. 213.139.161.102 (talk) 22:22, 1 April 2008 (UTC)
[edit] Article Improvement Drive
Contact lens is currently nominated to be improved on Wikipedia:Article Improvement Drive. Please support the article with your vote. --Fenice 10:51, 16 January 2006 (UTC)
[edit] Verisyse versus Artisan
The "Artisan lens" has been renamed to 'Verisyse' and has been FDA approved http://www.fda.gov/cdrh/mda/docs/p030028.html I'm also considering a cleanup with a clear distinction between the Phakic version (normally used as a replacement for contact lenses) and the ... uh... non-phakic version, where the natural lens is replaced -- to treat clouding of the lens. --Mdwyer 21:48, 4 April 2006 (UTC)
- The commonly used phrase for "non-phakic" is aphakic, as in "aphakic IOL" or "aphakic intraocular lens" :-) Don't know if there is a commonly used abbrevation for aphakic IOLs, though? When you say IOL, you normally mean aphakic IOLs, because the number of cataract surgeries are currently much higher than surgeries for correcting refractive errors. Though this might change in the future (10 years?)...
-- di92jn
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- Hmmm... Apparently "pseudophakic" is used for IOLs when you replace the natural crystalline lens with an artificial one. If you want to be precise, "aphakic" means the absence of a lens in the eye, and "phakic" means that there is a lens present. Don't know if this should be part of the article? Guess it should...
-- di92jn
The FDA documents suggest that Artisan and Verisyse are the same thing "Verisyse (Model VRSM5US and VRSM6US) also known as ARTISAN (Model 206 and 204) Phakic Intraocular Lens (IOL)", but the artical lists one as silicone and the other as acrylic. PMMA is the same as Acrylic. --Mdwyer 21:54, 4 April 2006 (UTC)
Acrylic:
- Ophtec produced the Artisan® lensacrylic IOLs.
Silicone:
- AMO (Advanced Medical Optics) produces the Verisyse™ lens.
[edit] Corneal Incision, etc
-- User:Steve McGrew I deleted the word "corneal", as the incision isn't made in the cornea, but in the white of the eye above the cornea. I also broke the paragraph before the Crystalens into two paragraphs, as the addition of the crystalens data made reading it clumsy.
I didn't change the statement that it requires a larger incision than traditional implants, but considered it as I've been researching this (I had the multifocal lens implanted in my left eye) and Wikipedia is the only place I've seen this. I'll ask my eye surgeon when I see her in September for the checkup. If she says the incisions are the same time I'll do a further edit. If any of you are eye surgeons have experience implanting these things, please clear the matter up. A citation would be helpful.
- The number of incisions change depending on what the doctor foresees is needed. Sometimes, the number of incisions are greater than actually needed - the surgeon makes the incisions "just in case", because it is more difficult to make incisions in the eye after a while, when the eye is softer because fluids has leaked out. Also, the locations - for example in the cornea or the sclera (the white of the eye) - and their locations depends on the lens type; is the lens inplanted in front of the iris, or behind it? Is the lens aphakic or phakic? Is the lens foldable or not? Please note that I'm not an eye surgeon, just very interested... --User:Di92jn
[edit] Structure of Intro
The current intro has a short para on was an IOL is and what it is used for. It then moves onto a para on the procedure for insertion, before returning to three short and confusing paragraphs on the different types. I have restructured this into two paragraphs by moving and reflowing paras 3-5 into para 1m so that para talks about the IOL and its use, Para 2 talks about the procedure, and Para 3 the risks.
Also the intro should be crisp and avoid drilling into detail that is covered later.
More improvements to readability than a material content change,
However the statement "Newer bifocal intraocular lenses give distance vision in one area and near vision in another area of the vision field" is just wrong. You do not have different fields as with bifocal glasses, so the new wording avoids this misleading statement. TerryE 23:39, 21 July 2007 (UTC)
[edit] URGENT: Vandalism
[Note will be removed.] Is the article vandalised?
- "most patents still rely on glasses for driving "
- "during Nd:YAG capsulotomy. "
- "Deducing that the transparent material was inert and useful for implantation in the eye, Ridley designed and implanted the first intraocular lens in a human eye."
- "...use of silicone acrylate which is a soft material. This allows the lens to be folded and inserted into the eye through a smaller incision. Acrylic lenses can also be used with small incisions and are ... ...Acrylic is not always an ideal choice due to its added expense.[repeated]"
--Connection (talk) 12:57, 26 November 2007 (UTC)
