Originally Posted by
Darryl Meister
It's certainly easier for the wearer to spot a progressive lens that has been fitted too high, since the blur from the add power in the progressive corridor will become immediately apparent. When the lens is fitted too low, it can become just as troublesome for near performance, though this is less likely to be obvious to the wearer -- especially upon delivery of the eyewear.
Consequently, the "once bitten, twice shy" dispenser who has heard her patients complain about high fitting heights one too many times may start over-compensating by fitting them low, since this results in more immediate wearer acceptance. Ultimately, these wearers may not be any more satisfied than the ones who threw the high ones down in the office, though it would be more difficult for them to discover and articulate exactly what the problem is with their near utility.
They may not even be truly aware of the fact that they are making uncomfortable postural adjustments or experiencing reduced reading efficiency. Also keep in mind that near complaints for low fitting heights will often be related to a restricted field of view at near, which is a rather common wearer complaint. (Essentially, the wearer is forced to read through the top of the near zone or bottom of the corridor if sufficient postural adjustments aren't made.)
Best regards,
Darryl
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