What does DBL refer to in optical dispensing?

DBL in optical dispensing stands for "distance between lenses." This term is used to describe the measurement taken from the center of one lens to the center of another in a pair of spectacles. This measurement is crucial for ensuring the correct optical alignment of the lenses in relation to the wearer's eyes, allowing for optimal vision correction and comfort. Accurate DBL measurements help in preventing issues like prismatic effects and can impact the overall appearance of eyewear.

The understanding of DBL is essential for opticians and dispensers when fitting lenses into frames, as it helps to ensure that the lenses are positioned correctly for the wearer's pupillary alignment. This ensures effective lens performance and overall satisfaction with the eyewear.