Inputs
Current glasses prescription
OD
OS
New prescription
OD
OS
Current glasses
Sample points (SE)
OD
OS
New prescription
Sample points (SE)
OD
OS
Target distance:
Eyestrain definitions (ratio = demand divided by usable accommodative reserve)
No strain
ratio < 0.10
Mild
0.10 to 0.24
Moderate
0.25 to 0.79. Meaningful use of reserve, may fatigue over time.
Significant
0.80 to 1.99. Demand approaches or exceeds reserve, symptoms likely with sustained use and clarity may vary.
Extreme
2.00 or higher. Physiologically unrealistic for sustained clarity, predicts failure, avoidance, or symptoms quickly.
Lens design controls
Current glasses design
Generic PAL uses fixed corridor and balanced distribution, with narrower usable zones.
New prescription design
Generic PAL uses fixed corridor and balanced distribution, with narrower usable zones.
Map appearance and peripheral modeling
Current glasses heatmap
0.00 D to 2.00 D, green ideal, red not ideal
OD
OS
Binocular disparity map, alert threshold 0.50 D
Lower mismatch is better.
Scale: 0.00 D to 2.00 D
Green = ideal
Red = not ideal
0.00
0.25
0.50
1.00
1.50
2.00
New lens heatmap
0.00 D to 2.00 D, green ideal, red not ideal
OD
OS
Binocular disparity map, alert threshold 0.50 D
Lower mismatch is better.
Same scale as current
0.00
0.25
0.50
1.00
1.50
2.00