Hello all,
well some of yous might remember me from last year and my endevours to pass First year of a long distance learning course to become a optical technician. Well i passed somehow! and onto second year.
I am onto paper 5 and got 2 questions.
Q1.
Rx +2.50/-5.50x180 is decentered 8mm up and in along 60 before the right eye. Calculate the single resultant prism produced by this decentration.
Don't answer it for me, i just cant understand what the question is asking, is it saying the lens is decentered 8mm up and 8mm IN, if this is the case whats the 60 for?
or
the lens is decentered 8mm up and the resultant prism is along 60?
GAH!!
Q2. Most bi-focal lenses have the reading addition in the segment. Can you name a solid bifocal that has the distance Rx in the segment?
To put it honestly no i cant name one, any of yous know one?
Thanks in advance!
Del
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