Troubleshooting & Best Practices

Non-Adapts

Use this guide when a patient cannot comfortably adapt to a new lens design after the prescription, fit, and frame have been dispensed.

Symptoms

Patient reports swim, pull, nausea, or a floating sensation after several days of consistent wear.
Distance feels acceptable, but near or intermediate zones are hard to locate.
Patient keeps lifting, lowering, or tilting the frame to find clear vision.
Patient compares the new pair unfavorably to an older pair that used a different design, fit, or frame shape.

The new design has a different corridor, inset, base curve, or peripheral profile than the patient is used to.
Frame adjustment changed after measurements were taken, especially pantoscopic tilt, wrap, or vertex distance.
Seg height, monocular PD, or fitting cross placement does not match the patient’s actual wearing position.
The patient was not coached on expected adaptation time or how the new lens zones should be used.
A large prescription, anisometropia, prism, material change, or frame-size change amplified peripheral differences.

Verify the frame is sitting exactly where the measurements were taken before judging the lens.
Inspect lens markings and confirm fitting cross, monocular PDs, seg heights, add power, and design ordered.
Compare the new pair to the previous pair: design, corridor, material, base curve, wrap, vertex, pantoscopic tilt, and frame dimensions.
Ask the patient to demonstrate the task that fails instead of relying only on a general complaint.
Coach the patient to wear the new pair consistently for several days if the measurements and frame fit verify correctly.
If the problem is task-specific, confirm the lens design matches the patient’s real working distance and head posture.

Contact the lab after frame fit, markings, Rx, and measurements have been verified.
Send the original order number, patient complaint, prescription, add power, frame measurements, seg heights, monocular PDs, and any comparison to the prior pair.
Include whether the patient is new to progressives, changed designs, changed frame shape, or changed material.

Do not remake a non-adapt before confirming the frame adjustment; small fit changes can create large perceived differences.
Document the patient’s primary complaint in practical language: driving, laptop, phone, stairs, reading in bed, exam lane, or counter work.
Use the same measurement posture every time: natural head position, frame fully adjusted, patient looking at eye level.
For sensitive patients, keep frame size, corridor style, and design family as consistent as possible between pairs.