virtual refraction

[iglsldy]

Hey guys, sorry has been a long time since I have checked on yall. Have a simple question. I was told that there is a web site that has virtual training on refraction. Could anybody help me with this? Also, along those lines, if anybody knows of any other web sites with virtual training on other optical skills, that would be cool to know also. Thanks for your help in advance.

[Steve Machol]

Welcome back!

I'm sure you'll get some good links, but here's one from our very own Darryl Meister:

OptiCampus

...which includes excellent on-line tutorials on "Basic Principles of Light", "Basic Optics of Thin Lenses" and "Simple Ray Tracing of Thin Lenses".

[Laurie]

Hello,

I found a site (however the address is in my office computer which is out of my office right now! (carpeting and painting office)

So, I will post it here asap.

It is something like "www.virtual retinoscopy"

"www.virtual phoroptor"

"www.virtual subjective refraction"

If you email me at:

lpierce@hcc.cc.fl.us

I'll forward the link to you.

It uses spot retinoscopy instead of streak, and the rating is in metric (6/6) instead of English Snellen (20/20)... I use it in my refraction courses at our opticianry college program.

Laurie

[Laurie]

Here's the link address for virtual retinoscopy and virtual subjective refraction.

http://www.homeusers.prestel.co.uk/academy/refract.htm


Have fun!

Laurie

[MVEYES]

Good site. Those of you who haven't been there should go and look around.





:bbg: Jerry

[Hiren Patvi]

Hey,

Its not working any more :(

Any more suggestions.

[Laurie]

Hi Hiren,

Try this: http://www.academy.org.uk/tutorials/refract.htm

: )

[ICU2020]

I have a question I'd like to ask. When surfacing if a Grayness at two obliquely opposite positions on the lens is seen what does this indicate? Was the wrong tool used? or possilbly there is an axis problem with the generator or cylinder machines?

Thanks,
ICU2020

[Wes]

The generator is off axis. Calibrate axis.

[RIMLESS]

Also check the axis on the finer cylinder machine. More likely the cyl machine but could also be the generator too.

[Wes]

How many cylinder machines? If its just one, it could be that too. Usually when we see this issue, its the generator.