Optical distortion concentrated in a limited area rather than distributed across the full lite or in a regular manufacturing pattern.
GlassRenu · Educational illustration
Meaning and boundaries
Localized distortion can pre-exist from fabrication or installation, or it can be induced by nonuniform material removal; cause must be established from baseline records.
Why it matters in glass restoration
A small restoration area can act like a lens or create visible edge transitions if removal and blending are not controlled.
Related terms
References
- 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