Originally Posted by
Jeff Trail
One thing is that you CAN NOT get that .50^ OU BO in the reading only in a PAL.. Don't care who or what lab you are.. the only way would be to use Fresnel. That .50 OU in "reading only"is not even worth diddling with if you are dealing with 6 degree's of slab anyway.
Sounds like you ran into a problem I have seen many times over the years, the OD or MD or optician dropped the ball on that imbalance due to power and they are splitting in the reading and the OD or MD comes up with this "oh they "may" need a slab" and to make it really sound like that "oh and .50 OU BO in the reading" would really mean a thing is just the ole "cover your A$$" policy.
Do the slab (which you were correct prism in the 90) and forget that .50 OU in the near.... and no one will ever know the difference.
No matter what we do at ties can NOT fill an RX due to the restraints of designs, materials or frames, just have to tell him/her that that .50 OU in the reading only in a PAL is impossible without using Fresnel and dollars to doughnuts bet he/she just tells you "well than just slab it".. it sounds like to me that's the only problem worth worrying about here anyway is that 6 degree's of imbablance.
Oh and if he/she really insists on that .50 OU than explain it has to be a hard seg only that can be used to get this effect..unless they want Fresnel.
Jeff "no matter what sometimes we just can't do the impossible" Trail
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