NormDefocus

Defocus Curve AUC Analysis

Disclaimer and intended use

NormDefocus is intended exclusively for research, educational, and exploratory analytical purposes in the study of intraocular lens defocus curves. It is designed to support structured visualization and quantitative interpretation of defocus profiles and absolute AUC metrics.

This software does not replace clinical judgment, ophthalmic examination, manufacturer calculators, validated biometric formulas, or institutional protocols. The outputs generated by the application must not be interpreted as treatment recommendations, diagnostic conclusions, or surgical planning decisions.

All calculations depend on the accuracy of the visual acuity and refraction data entered by the user. Users are fully responsible for verifying data integrity, confirming the appropriateness of the testing protocol, and interpreting the results within the clinical context of each patient.

  • The application provides analytical support only and should be used by qualified professionals familiar with defocus curve methodology.
  • Results may be influenced by measurement conditions, residual refraction, chart design, testing distance, binocular summation, and other patient-related or methodological factors.
  • Any clinical, refractive, or surgical decision must be based on a comprehensive ophthalmic evaluation and not on this software alone.

By clicking Accept and start, you acknowledge that you understand these limitations and agree to use this application under your own professional responsibility.

NormDefocus

Defocus Curve AUC Analysis

ESEN

Patient and examination data

Input refractionIncluded in Excel export. (SE = S + C/2 if cylinder is entered).
Protocol: defocus from +0.50 to −3.50 D in 0.50 D steps. Zones: Far (+0.50→−0.50), Intermediate (−0.50→−2.00), Near (−2.00→−3.50).

Examination setup

Mode
Select defocus levels
Select the defocus levels and click “Start examination”.

Active examination

Enter VA in the displayed order. Then click “Generate curve”.
Defocus (D)Sphere (phoropter)VADecimal
Threshold (decimal)Threshold (logMAR eq.)Style
Absolute defocus curve
logMAR
Area under threshold (AUC)

Absolute AUC by zones

ZoneAUC (abs)Unit