What is the primary purpose of polishing contact lenses in-house?

The primary purpose of polishing contact lenses in-house is to remove scratches from the lens. Over time, contact lenses can develop minor surface scratches due to handling, environmental factors, or simply from regular wear. Polishing helps to smooth these imperfections, which can improve both the comfort of the lens when worn and the clarity of vision.

While enhancing visual acuity might seem related, it's not the primary reason for polishing. Ensuring the lens surface is free of scratches directly supports clearer vision, but the action of polishing itself focuses mainly on maintaining the lens's structural integrity and comfort. Changing the lens power or increasing the lens thickness are procedures associated with creating or modifying a lens, rather than maintaining it through polishing. Therefore, the act of polishing is specifically targeted at preserving lens quality rather than altering its optical parameters.