Patient with a wiley-x wrap frame came in complaining of trouble past 10 ft, but periphery is clear.
Rx: -2.00-0.75*28, 0.5 BO prism / pl-1.25*88, 0.5 BO prism PD:67/64 in a FT28 +200 all in a base 6 lens
Sent them back to the lab and everything is in tolerance. Lab suggested frame with less wrap.
Any ideas?
Any record of previous Rx?
His dress pair work just fine for him.
This frame should be wrap compensated.
Wesley S. Scott, MBA, MIS, ABOM, NCLE-AC, LDO - SC & GA
“As our circle of knowledge expands, so does the circumference of darkness surrounding it.” -Albert Einstein
I second Wes's suggestion to ensure it us compensated.
If so, use Rx flippers to determine if acuity can be improved. Try the same over their conventional eyewear too!
Don't forget that wraps are almost exclusively long distance, whereas reg eyewear is used more indoors
B
Pt uses dress pair for driving, I negleted to state that the dress pair is SV. Wrap frames are compensated and within tolerance, but is a FT28 that is used as safety glasses. Pt is a fork truck driver and is using these inside the mill for the most part.
Re-examining the notes and Dr bumped the Rx up a quarter step.
Something is obviously off within the compensation granted for the wrap component...............patient is observing better peripheral than central acuity, correct?, and only in this pair. The fact that they are SV vs Bifocal is of no consequence, except for base curve differences.Originally Posted by jmainwar
A good start.
wrap frame much larger? OC taken for the 2.25D imbalance @ the 90?
I'm not aware of any USA lens manufacturer that generates, on a freeform platform, a FT28 that's optimized for non-best form BCs and POW. The lab probably just used a relatively simple Rx calc program to compensate for tilt and POW. Your best chance for a successful outcome, considering this more complex anisometropic and prismatic Rx, and if it must be a wrap lens (hyper sensitive to light, dry eye, etc.?), is to use a high quality optimized SV lens design from Zeiss or Shamir.
Science is a way of trying not to fool yourself. - Richard P. Feynman
Experience is the hardest teacher. She gives the test before the lesson.
IOT does in fact provide an enhanced freeform surface for flat-tops.
Hi Shanbaum. When you say enhanced do you mean aspheric/atoric comps? And will they comp 8 base/out of norm BC's? And whom is offering it here (lab wise?)
Thank you for the heads-up. I talked to Kurt at IOT for about thirty minutes- their FT's are still being tested and are not yet available for sale. A work in progress so to speak.
Science is a way of trying not to fool yourself. - Richard P. Feynman
Experience is the hardest teacher. She gives the test before the lesson.
Check with US Optical. There's also one from Essilor that you may be able to get from NEA in Jonesboro, AR.
IOT is usually pretty flexible about base curves... some of the other LDSs aren't.
Yes, aspheric or atoric, with BC and POW optimizations calculated in real time.
Science is a way of trying not to fool yourself. - Richard P. Feynman
Experience is the hardest teacher. She gives the test before the lesson.
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