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Association of Technical Opticians
P.O. Box 114
Shrewsbury, PA 17361


September 2010
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  • visual acuity
    • Latest Message 1 month, 3 weeks ago
    • optical24/7 : Thanks for the ROATx mention!
    • robbo uk : hi how can i obtain the Asphericity eccentric values to use on Darryl Meisters Optical Analyis software I have tried various sources but to no avail HELP!!!
    • Michelle Diaz : Alvaro, hace aprox 1 ano empece a estudiar Ciencias Opticas en Puerto Pico pero no lo pude terminar me encantaria terminar mis estudios por la internet... Pero antes quiero saber que guia de estudios deberia llevar. Materias para tomar el examen del abo.
    • Barbra : Is there anything on this site that can help me with my LDO practical exam?
    • Harry Chilingueria : Yeah, they'll always find a way around whatever programming is in place.
    • Alvaro Cordova : alf =half
    • Alvaro Cordova : do you ever wonder if alf of the requests are just bots?
    • Harry Chilingueria : What about the aspheric curve would you need to know?
    • lyamine : need te know the aspheric curve
    • Harry Chilingueria : Al, that was awesome of you to metion it.
    • Alvaro Cordova : Congrats on the accreditation by the way. I've been meaning to drop you a line. :)
    • Harry Chilingueria : They are being worked on, in the near furture their will be a study guide available.
    • choclatedahl : are there any study guides for the abo?
    • Harry Chilingueria : Awesome Cindy, I have signed up for the Vision Canada convention and like last year I look forward to the content and will be especially interested in your lecture, can't wait. :)
    • Cindy K : Harry- yes we're doing the Virtual Convention- here's the link:«link» I've also put this on Optiboard under heading of Professional and Educational Discussion Forums. And, BTW, I'm presenting my favourite workshop, MCE on a Budget (explains in detail the mechanics and means to develop study groups). and, thanx for the web content info- I see several things I'm going to get onto our website! And I'll be certain to credit all as appropriate.
    • Harry Chilingueria : Oh and Cindy if you guys are doing the virtual convention please send me a link so Icould check out who you got this year as I would be real interested.
    • Harry Chilingueria : Cindy K, no protocal for using the content from this site, but the images are from NIH, which does require a reference back to them, just do a Google search for NEI at NIH and check out their resources. The simulators are from Alcon and they have said as long as it's for a non profit or educational they are fine to use. The posts and content are mostly written by me and compiled from various sources, you are free to use them to your hearts content.
    • Cindy K : What is the protocol here for using material from this site on our association website? Please advise
    • Cindy K : Harry- are you going to do the Vision Canada Virtual Convention again this year? I see what I'm assuming is an old post you made on the subject. The lineup is great this year, and bonus, I get to present one of my favourite lectures there
    • Harry Chilingueria : Hey geeth, hows it going?
    • geeth : hai
    • Alvaro Cordova : ICQ is a messenger similar to yahoo messenger. I don't think it is a required field to register
    • maulik : can't fill your resistration process. What is ICQ
    • Alvaro Cordova : follow the link to go to the "bad behavior" program.
    • Alvaro Cordova : «link»
    • Harry Chilingueria : Ieriwinner_58, when you use the contact form use th eupper portion of it to submit not the comment section. I did not get your site address to check it out so if you could resend the address, I will take a look.
    • Harry Chilingueria : I have one more thing that will be available to only members that I am currently working on. It is a database with all contact lens parameters, price, and manufacturer contacts. I have got the script set up for uploading and the tables in the database are ready, now I am going to add a section or so every few days and it should be done in a few weeks. So keep coming back I have more resources and software coming.
    • Donn McCarthy : Looks Good!
    • Brent McCardle : Wow Harry, the site looks Great!
    • Harry Chilingueria : Thanks Al you know you are more than welcome to make copys for your site and I can send you the source code for the programs if you are interested. You should start to see the Mandell-Moore calculator being used in optometry colleges to teach students.
    • Alvaro Cordova : I like your recent entries pretty cool stuff. Congrats again on passing the Adavanced exam if I didn't already.
    • Harry Chilingueria : Their is no limit on the number of time one can submit a paper.
    • Harry Chilingueria : I have a version of it written, I called and asked how many times I can resubmit a paper, but Kara Burgess the lady in charge of the program wasn't in so I guess I will find out on monday. :D
    • Donn McCarthy : Have you started on your paper for the ABOM? How many times can you submit a paper?
    • Harry Chilingueria : I just got my results for the ABO Advanced exam, I passed.

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    « New Online Education
    ABO Outline and Test Specs »

    Reduce Spherical Aberration

    R1=front radius of curvature
    R2=back radius of curvature
    i=image distance
    o=object distance
    n=index of refraction

    Reduction of Sperical Aberration

    (R1+R2)/(R1-R2)=[2((n^2)-1)/(n+2)]*[(i+o)/(i-o)]

    This entry was posted on Friday, December 8th, 2006 at 10:57 pm and is filed under Equations. You can follow any responses to this entry through the RSS 2.0 feed. Both comments and pings are currently closed. |Download this PostConvert to PDF

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