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|WikiProject Medicine / Ophthalmology||(Rated C-class, High-importance)|
- 1 Green or Red
- 2 cataract operation,implant of lense, can this lead to cjd
- 3 Misleading
- 4 Info on "Real World" Impact
- 5 Notable individuals with astigmatism
- 6 With/against the rule
- 7 Link to the Alpins method of astigmatism analysis
- 8 New illustrations
- 9 Requested move 29 September 2016
- 10 Too technical
- 11 What does "cylinder" actually mean?
Green or Red
I recently went to have my eyes checked and was told that I have astigmatism, albeit "just a little." He came to his conclusion based on a series of tests with white superimposed on green and red backgrounds. I observed the letters through a phoropter. I was asked which letters appeared clearer: the ones superimposed on the green or red background? This does not appear to be a reasonable test for astigmatism. If I am not mistaken, shouldn't an astigmatism chart be used if one was to diagnose astigmatism? Anyone have any ideas? mezzaninelounge 14:19, 20 July 2006 (UTC)
- Doesn't it have more to do with the eye doc looking inside your eye? JayKeaton 08:53, 1 November 2006 (UTC)
The government page on astigmatism http://www.nlm.nih.gov/medlineplus/ency/article/001015.htm states that "Glasses or hard contact lenses will correct astigmatism. Soft contact lenses do not work as well." I have a 180 degree axis in one eye and a 170 degree axis in the other eye and am able to use softmed torics which are soft lenses. The doctor told me that those would be better than buying hard lenses. I have no problems wearing them or seeing with them and my astigmatism is horrible. I'm wondering too if there is any genetic basis for having astigmatism. My mother also has a huge axis on both eyes. --Starladustangel 05:06, 21 November 2006 (UTC)
- This is not true. I have astigmatism and I'm using soft lenses to correct it. 126.96.36.199 09:37, 23 February 2007 (UTC)
cataract operation,implant of lense, can this lead to cjd
this is bhatia here, my uncle who is in varanasi INDIA, was opearated for cataract 6 months back,has suddenly being diagonised having cjd, is this possible.can you guide us in this. —The preceding unsigned comment was added by 188.8.131.52 (talk) 15:56, 29 April 2007 (UTC).
- By "cjd" do you mean Creutzfeldt-Jakob disease? Because that has nothing to do with cataracts, eyes, or astigmatism. Furthermore, Wikipedia is not WebMD, and the discussion page does not exist for you to ask questions about the validity of medical diagnoses. --184.108.40.206 21:12, 28 October 2007 (UTC)
The cornea, instead of being shaped like a sphere, is ellipsoidal (like an egg)
Spheres are ellipsoids. This statement does not meaningfully draw a distinction between a healthy cornea and an astigmatic cornea. What actually differentiates spheres and eggs is that eggs are mostly prolate and spheres are neither prolate nor oblate. It is also wrong to say that "ellipsoidal" means "like an egg". An egg is a very special case of an ellipsoid, just as a sphere is.
Quite simply, an astigmatic cornea resembles a prolate hemispheroid whereas a healthy cornea resembles a spherical hemispheroid. An egg would actually be both of those two joined together. --220.127.116.11 21:26, 28 October 2007 (UTC)
Info on "Real World" Impact
I would love to get a sense of how astigmatism of various degrees affects ones vision. How is the subjective experience or the objective abilities of someone with a given level of astigmatism compare to myopia. Am I correct in assuming that myopia is a "bigger" problem? --RedHouse18 19:37, 5 December 2008 (UTC) —Preceding unsigned comment added by RedHouse18 (talk • contribs)
Notable individuals with astigmatism
I'm removing the "Notable individuals with astigmatism" section. First of all, astigmatism is extremely common (just read the article to see). It's like having a section on "Notable individuals with dandruff". Second, none of them are cited. Greg Salter (talk) 07:36, 13 June 2009 (UTC)
What is the future impact of astigmatism for a patient?
I have -12.5 and -11.5 power glass and in one eye it has cylindrical power. Now I am wearing a spectacle with that power. My question is what would be the future effect of this problem? Am I going to be blind in future days or not? — Preceding unsigned comment added by 18.104.22.168 (talk) 06:58, 28 May 2011 (UTC)
With/against the rule
The article says "In With-the-rule astigmatism, the eye sees vertical lines more sharply than horizontal lines. Against-the-rule astigmatism reverses the situation. " Is this correct? It seems that it depends on the spherical refraction/acommodation what axis is seen sharper. Depending on the spherical focal distance, in either case (with or against the rule) one or the other orientation could be seen sharp. If the total spherical equivalent matches the object distance, neither axis will be seen sharp. Can anyone confirm? 22.214.171.124 (talk) 14:52, 15 June 2011 (UTC)
Link to the Alpins method of astigmatism analysis
The Alpins method of astigmatism analysis is a new entry, currently listed as an orphan. It forms the basis for ANSI standards related to planning/analysis of astigmatism correction in refractive surgery (a new section that will soon be added). It includes a link to Astigmatism (eye); can I insert a link in Astigmatism (eye) back to the Alpins method (not sure of the protocol here, as I'm new to this). Thanks. Kcroes (talk) 13:43, 5 February 2012 (UTC)
Hello! I'm from Russian part of Wiki)) For some reason I needed an illustration for my article, but the original picture had a very bad resolution. I've redrawed it. You can use it if you want. Best wishes)) Russian page https://ru.wikipedia.org/w/index.php?title=%D0%90%D1%81%D1%82%D0%B8%D0%B3%D0%BC%D0%B0%D1%82%D0%B8%D0%B7%D0%BC_%28%D0%BC%D0%B5%D0%B4%D0%B8%D1%86%D0%B8%D0%BD%D0%B0%29&stable=0 Illustrations
Requested move 29 September 2016
What does "cylinder" actually mean?
I know what a cylinder is, but this article starts using the term like it is a specialized optical concept (which it is) and gives no explanation of it. There is no corresponding Wikipedia article on "Cylinder" or "Cylinder (visual)" that means the kind of cylindrical correction for a contact lens. This article on astigmatism doesn't make this any more clear (as it were). A loose noose (talk) 06:16, 8 May 2018 (UTC)
- There's at least some attempt at a definition at Eyeglass prescription#Cylinder component, although it's still not super consistent in my opinion. I've changed the entry you added to the DAB page and I may just create a redirect that this page can use too. Edit: I've created it. -- Fyrael (talk) 14:50, 8 May 2018 (UTC)
- "Cylinder" is a reference to a cylindrical lens. If you combine a spherical and a cylindrical component in the same surface of one lens, you get a toric lens.--Srleffler (talk) 01:33, 9 May 2018 (UTC)