Monitor Top-at-Eye Height Alignment Checker
Audit measured screen top relative to actual seated eye datum under caller allowed offset, preserving signed displacement; not ideal monitor-height prescription or visual-health assessment.
Description
Screen-top alignment uses a measured eye datum and signed offset.
Screen-top alignment uses a measured eye datum and signed offset. Caller bounds determine the nearest compatible offset.1
Enter nonnegative eye/screen-top heights and an ordered finite offset pair in centimeters. Return signed offset, inclusive fit and signed nearest-policy adjustment.
When to use Monitor Top-at-Eye Height Alignment Checker
Use Monitor Top-at-Eye Height Alignment Checker when you need to evaluate the supplied records under the calculation and evidence rules below. No ideal monitor height, posture or visual-health assessment is inferred.
Prepare measured task, body, furniture or already weighted exposure records. Supply independently verified caller policies, tables and comparison limits with matching units and conditions.
How to use Monitor Top-at-Eye Height Alignment Checker and understand its results
- Prepare measured task, body, furniture or already weighted exposure records. Supply independently verified caller policies, tables and comparison limits with matching units and conditions.
- Enter measuredEyeHeightCm, measuredScreenTopCm, callerAllowedTopMinusEyeBoundsCm using the field table and calculation rules, then run the tool.
- Read signedScreenTopMinusEyeCm, withinCallerAlignmentBounds, nearestPolicyAdjustmentCm. The explanation below defines the units, signs, ordering and any flags or placeholder values.
- If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.
| Input field | Meaning | Value type; see rules below | Requirement |
|---|---|---|---|
| measuredEyeHeightCm | Measured eye height cm | number | Required |
| measuredScreenTopCm | Measured screen top cm | number | Required |
| callerAllowedTopMinusEyeBoundsCm | Caller allowed top minus eye bounds cm | list of number | Required |
Enter nonnegative eye/screen-top heights and an ordered finite offset pair in centimeters. Return signed offset, inclusive fit and signed nearest-policy adjustment.
offset=screenTop−eye; adjustment=clamp(offset,bounds)−offset Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| signedScreenTopMinusEyeCm | Signed screen top minus eye cm | number |
| withinCallerAlignmentBounds | Within caller alignment bounds | boolean |
| nearestPolicyAdjustmentCm | Nearest policy adjustment cm | number |
{
"input": {
"measuredEyeHeightCm": 120,
"measuredScreenTopCm": 125,
"callerAllowedTopMinusEyeBoundsCm": [
-5,
0
]
},
"output": {
"signedScreenTopMinusEyeCm": 5,
"withinCallerAlignmentBounds": false,
"nearestPolicyAdjustmentCm": -5
}
}Limitations and assumptions
No ideal monitor height, posture or visual-health assessment is inferred.
Numeric inputs, where present, must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Numeric lists are limited to 10,000 entries; string lists to 128 strings of at most 128 characters each. The rules above may impose smaller limits. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors. A successfully returned false flag is an evaluated outcome; its meaning is explained above.
Alternative or Complementary methods
Use Screen Glare Window Reflection Angle Risk Checker: A planar specular reflection can point toward a viewer. Incoming ray direction differs from a vector pointing toward the window. For a complementary task, use Document Holder Angle Neck Flexion Reducer Checker: A document sightline has a signed downward angle. Raising a document above eye level makes that angle negative.
References
Similar or alternative tools
- Screen Glare Window Reflection Angle Risk Checker
A planar specular reflection can point toward a viewer. Incoming ray direction differs from a vector pointing toward the window.
- Document Holder Angle Neck Flexion Reducer Checker
A document sightline has a signed downward angle. Raising a document above eye level makes that angle negative.