First, thanks for all information from you . A few questions for you Chris. Where I can buy yours products in Europe? Have you product for grey color, or I must mix several products to get grey...
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First, thanks for all information from you . A few questions for you Chris. Where I can buy yours products in Europe? Have you product for grey color, or I must mix several products to get grey...
Hello,
My problem started when pair of customers claimed that their grey lenses and G-15 lenses (both were CR-39 n= 1,5, colored lenses with some dioptric power) have red color too. I tried to order...
I need contrast sensitivity test. Does anybody know some piece of free software who will do the job? I need this test for testing my patients who have cataract, for my final work in my school.
No, I am not Borysko.
Thanks for your answers but nobody tell me what regulation you have in your country about this theme! I asked my teacher (who is from Great Britain) and he told me that there (GB) regulation not...
Nobody? Common, you can better!
I am wondering what is a minimum space for refraction in your country? What kind of regulation you have? In Serbia, from where I am, there yet no such regulation at all. But, now administration want...
I am sorry, I forgot to tell that this AR/K is made by Huvitz.
Again, any recommendation, experience... is welcome.
Thanks in advance
Have any some experience with this AR/K?
If you have, please share this with us.
I am looking, maybe, to by this. So, every suggestion is welcome.
Hello,
I want for my final exam to make same excel spreadsheet for all necessary basic calculations in optometry-optician practice.
Idea is to have some useful tool that can be helpful in all...
I am sorry. I loose my control:hammer:.
Ok,;) thanks for all!
What is relationship between Jaeger’s optotype and N- optotype for near?
Size, VA?
Thanks for links, but I need formulas...
Does anyone now how to calculate different size from some optotype, conversions (Snellen to logMAR…) …?
I am using OpenOffice.org. It is free, and here is link:
http://download.openoffice.org/
Thanks for all your suggestions, finally, here is my homework. Now, if there is some mistake, please, tell me.
David, this is my homework.
Darryl, thanks. Now I figure, in general.
But, for me, there is another problem. I must calculate this with graphical/mathematical method, with polar (circle)...
Patient's Rx (eyeglasses) is
Right eye: 0,00 Sph = - 3,00 Dcyl ax0
Contact lens (on right eye):
0,00 Sph = -3,00 Dcyl ax20
Teacher give us this problem:
Patient's correction (Rx) is 0,00=-3,00 axis (visus 1,0 (20/20)) from right eye. We put on the patient's right eye contact lens the same power but it was rotate for 20...
Does optician perform eye refraction? In some states in Europe and opticians, with additional education, can perform eye refraction.
Hello,
Please, can someone tell me which professions can perform eye refraction in USA, and what are their competence in practical work?
In Serbia (Europ), we just started the process of...
Does anybody know answer for my previous post?
Maybe is point of confusion because I don't clear told that for me is not important how this sagittal plan refract a light, where is a focus. As you can see, this is not showed on last picture. I...
I forgot to write: this is a spherical lens .
Lets say that we want looking only sagittal plane. On the surface on the lens there is lot of
sagittals planes, like tangentials planes. Infinitely. But we want to see only one, and in 3D.
If we...