Hey there optiboard goers,
First, let me apologize if this has been mentioned in another thread, I did a quick search on the board but couldn't find anything specific.
After doing some research I came across the importance of vertex distance. The Carl Zeiss Optical Training Guide has a section on the mathematics behind this measurement. Ive talked to opticians that are much smarter then me (which is the first thing I like to do when I don't understand something (and quite plainly why I like posting here <3)) how important this measurement truly is. Clearly in a higher power lens (+10D) its quite dramatic. In the garden variety Rx it just doesn't seem that important and the standard refraction distance (14mm?) seems right. Ive been doing this for some time and this never seems to come up except for the higher end progressive lenses like the Varilux S or the Hoyalux iD lifestyle or the ipseo. So, except for Rx's of 10+ diopters, is this a necessary measurement? Should I prompt my office manager to purchase a distometer? I can obtain that measurement using the Visio Office but is it necessary for every patient?
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