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Darryl,
Great work!! It is very simple in presentation that even a layman can understand.
However I have one question,that is about optical sign convention
You have described horizontally only.How...

I vote big yes.I am trained to refract and recognise abnormal eye conditions in my dispensing opticians course.

I second opinion of John R. I find american syllabus to be different in training...

Hi Haya,
The languages I can communicate are Gujrati,arabic,urdu,kiswahili and english.
The great linguist that I am !!:cool:
Thanks,
Sara

hi Haya,
it's nice to know you know arabic,I'll come to you for lots of translations!!:D
Thanks,
Sara,the one who likes"haya";)

Hi haya,
Darryl has answered your question well.
There is a formula to find new sph-cyl from obliquely cross-cyls which you can apply here for your question.Unfortunately my keyboard does not have...

Thank you all for your help,now I can better advise public on safe viewing of solar eclipses.
Thanks again,
Sara

Here is my two cents worth:cool: ( I am learning american way)

Well,Who are optometrist ? I believe they are actually "refractionist" only with little futher knowledge of ocular pharmacology and...

Hi Steph,
I am so much used to focimeter that I am doing guess work now.
I think this is how it works.:eek:
1)it is calibrated to be used on crown glass of index 1.523
2)before attempting to...

Hi Darryl,
Yes I am interested,would it be possible for you to email me.
Thanks,
Sara

HAPPY BIRTHDAY MULLO

hOw YoUnG ArE yOu ToDaY???
:D
Thanks,
Sara

Uncle Chip,
Today I know that you are naughty:D However my thinking is Maria will wear swimsuit,not t-shirt.
Anyway, Maria have a wonderful and funfilled trip!:) All the best.
Thanks,
Sara

Dear Optiboarders,
Few weeks back there was a solar eclipse in central and southern africa and I heard over a radio an optician in Zambia selling cheap sunglasses for viewing this solar eclipse.I...

David,
Is it "visual physiology" or "visual optics",or does it mean the same.
I believe FBDO qualification is well recognised in your country right?
Thanking you in advance.
Sara

ratio 1:2 approximately

May be someone will correct me.
Thanks,
Sara
:rolleyes:
optical student

it works Steve, but nobody in room to chat.
Thanks,
Sara

Harrr Saake,
All the same, great, is'nt it?
Thanks,
Sara:cheers:

I think ophthalmologist should not dispense from ethical point of view.Their knowledge of dispensing is so poor that they don't know how to read prism on focimeter,sometimes they just handover...

Shabbir I think there are'nt many cause more than half of the african continent is francophone. Try to post with SAO.
Thanks,
Sara(fingerless one):D

Dear Darris,
Honestly your answer is irrelevalant to this tread and my question.You have strayed in answering logically.
Please come out of shell and read Shabbir's post#88 which you might have...

Darris,
Can you please explain or define me what do understand by "depth perception" which you wrote in one of your post on lasik in this tread and why do you relate it to this particular topic and...

Jo,
We mostly dispense photochromics in glass lenses(80% of our selling is glass lenses).
I have noticed difference in performance of glass PGX lenses when altitude changes. At sea level they are...

Ashish,
Thank you for your intelligent posting.By the way what does your under the line writing "mera bharat mahan !!!" mean?

Is this an indian or american slang :D

Thanks,
Sara

Hi Darryl,
Thank you for your explaination,now I understand that there is little difference between American and British optics text, which I learn.
I understand very well now.Thanks again,
Sara

rfish777,
I also agree with you.However,I feel Darris should have been more professional in language approach,I mean used simple & direct english.Also I know Shabbir is not bad at english because...

Mullo & Maria,
Many thanks for your advises.I my part of world we don't have return or exchange facilities.I have decided to change solutions in all lenses and make sale clearance of inventory....