I am going to cross post this message as it is extremely important for strabismics and for parents of strabismic children seeking prism lenses.
Be extra careful when ordering prism glasses as some opticians have no idea what to do with strabismic patients and may calculate their own pupillary distance (PD) measurement that will not be the same as the developmental optometrist's PD. The difference in the PD measurement can have disastrous effects on your prescription. Although Luxottica Retail says they'll change their training programs for their opticians after my incident, I don't know if they really will. Even if you go to non-Luxottica owned optical stores, make sure the optician doesn't override your doctor's prescription because of the "Standard Operating Procedure" for measuring PD.
Effect: I had to drive with one eye closed because my left field of vision moved faster than my right field. The divider lanes on the left doubled at a 20 degree angle into my lane, causing me to get confused as to where my lane was. At night, the extra divider lane was not only at a 20 degree angle but it was sometimes elevated above ground. If you've ever had to drive with an eye closed, you know how hard it is.
I couldn't look down when descending a staircase because the end of the step would also double at a 20 degree angle, making it hard for me to see where the end of each step was. Other lines, whether they be on sidewalks or my kitchen floor, would double or be distorted.
Excellent result, Susanna, thank you for updating us with the results of your inquiries and protest.
I am so glad you posted this! It brought back memories of my own Sears Optical snafu when they measured where my pupils should line up in my new progressive lenses by asking me to look at the optician's eyes so she could mark dots where my pupils were. After the first pair was a disaster, we re-did the test at my insistence. They were blowing me off until I asked for a marker, looked at a sign in the distance, and put dots around the margins of clear vision on each lens to show where the margin was off on one lens.
The second time she measured, I did not keep gazing at her eyes with my good eye (which caused her to mark the turn in on the bad). Instead, I looked at her right eye with my left, then alternated and looked at her left eye with my right. To this day, I'm not sure she understood why I had to do this.
Fortunately, no near accidents occurred, and the second pair of glasses was free. I just had wonky blurriness in my central vision in one lens and a boat-load of aggravation to deal with because of their ignorance. At that time, I didn't know I was an alternating esotrope.
Bottom line, if I need prism, I will never get prism through anyone but my developmental optometrist! I love my Sears frames to this day, have a second pair, and will simply order and pay more buckaroos for just the lens(es)
In addition, I will always inform every non-developmental optician of my condition prior to subjecting myself to their pupilometer (image here http://www.toreuse.com/wp-content/uploads/2011/01/reichert_PDM.jpg) and advise them that the measurement it takes will not be trustworthy. They can then compare that measurement to the one they get when I look into their right eye with my left and left eye with my right.
So I'm not the only one who has suffered at the hands of Sears Optical's poorly trained staff. Although I had told the optician that I'm strabismic, I think it meant nothing to her.