Originally Posted by
sharpstick777
An improvement on near and intermediate zones will depend on 2 things, were you using Mono near PDs previously? And were you using lenses that actually used the REAL patient near PD? There are only 4 lenses in the US that use Near PDs, but I consider it the most important POW measurement over them all. not only can I calculate where to perfectly put the reading for each patient, I can actually use a combination of Distance RX and near PD to estimate the axial length for better distance Ray Tracing. In the end it improves near zone immensely, but distance zones some.
I am thrilled with your success, but it may be due more to the lens and less to the measuring device. Right now the only lenses that use a real Near PD are the Zeiss Individual 2, the Seiko Surmount, Superior and Supernal (lesser degree on the Supernal). The Rodenstock Impression does as well but its not easily available in the US. In every other lens the corridor is not truly aligned for the patient.
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