Alteration of an image seen in reflection from a glass surface or glazing assembly.
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Meaning and boundaries
Reflected distortion is influenced by surface shape, viewing geometry, reflected scene, coatings, glass construction, temperature, pressure, and installation; it is not automatically a restoration defect.
Why it matters in glass restoration
Reflective façades can make small changes in surface curvature highly visible, requiring controlled baseline and final evaluation.
Related terms
References
- National Glass Association — GANA Glazing Manual, 2022 edition
Publisher’s original source - National Glass Association — Methods of Measuring Optical Distortion in Heat-Treated Flat Architectural Glass
Publisher’s original source - ASTM International — ASTM C1652/C1652M-21(2025): Measuring Optical Distortion Using Digital Photography of Grids
Publisher’s original source - National Glass Association — Glossary of Terms for Color and Appearance
Publisher’s original source