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Hi Make Optics,

i don't have the professor's steps. These are just past year papers I was practicing before my exam.

But I believe the working you provided is the correct steps.

Thanks...

Hi Robert,

Sorry for the late reply. I just got this question from my past year papers that I was practicing. These are advance ophthalmic past year papers.

I would like thank everyone for...

Thank you so much make optics. I prefer to do it with the step along method too. The formula method is confusing to me. It totally makes so much sense now. Thank you so much for the understanding....

Hi Robert, I'm sorry I left out the axis of the prescription for question 2

i believe the nominal form of the lens they are looking for


+10.00DC*115 / +12.00DC*25...

Hi Robert, first I wish to thank you replying.

i will include my calculations for the first question. Please advise if I'm wrong.


Centre thickness= 5.75 Index material = 1.74



the...

My final advanced theory in ophthalmic lenses examination is next week. I have been doing my past year papers and I only have 2 questions left that I'm not sure how to solve. I hope someone here can...