43. Sources of errors ...
Heights
Monocular PDs
Swapped lenses
Wrong power & axis
44. Complaints & Remedies...
PROBLEM
Blurry Distance Vision Possible Causes
• Fitting too high
• Incorrect Rx
Remedies
• Open the nose pads
• Remake lenses
45. Complaints & Remedies...
PROBLEM
Blurry Near Vision Possible Causes
• Fitting too low
• Inadequate pantoscopic
tilt
• Incorrect Rx
Remedies
• Bring in nose pads
• Frame adjustments
• Remake lenses
47. Complaints & Remedies...
PROBLEM Possible Causes
Reading area too small • Incorrect PD
• Fitting heights too low
Remedies
• Frame adjustments
• Refit lenses
48. Complaints & Remedies...
PROBLEM
Possible Causes
Having to look to the side
• Incorrect PD
to read
• Swapped lenses
Remedies
• Refit to correct PDs
• Swap lenses if frame
symmetrical
49. Complaints & Remedies...
PROBLEM
Possible Causes
Having to tilt head too far
• Incorrect PD
back to read
• Add too weak
• Change in design
Remedies
• Bring in nose pads
• Increase the add
• Refit lenses
50. Complaints & Remedies...
PROBLEM Possible Causes
Having to tilt head • Undercorrected
hyperope
backward for distance
• Overcorrected myope
Remedies
• Repeat the refraction
• Refit lenses
51. Complaints & Remedies...
PROBLEM Possible Causes
Having to tilt head • Add too strong
forward to read
• Remedies
• Repeat the refraction
• Refit lenses
52. Complaints & Remedies...
PROBLEM Possible Causes
Having to tilt head • Fitting height too high
forward for distance
Remedies
• Frame adjustment
• Refit lenses