Accuracy and reproducibility of one-day disposable contact lenses.

One-day disposable contact lenses are experiencing rapid market growth in certain markets, such as the United Kingdom. Because of the huge numbers of lenses required to satisfy this modality of wear, both practitioners and patients need to be reassured about the quality of these products. Analysis of the accuracy and reproducibility of each of three currently available 1-day disposable lenses was conducted with respect to the following lens parameters: total diameter, back optic zone radius, center thickness, water content, and back vertex power. Fourteen of the 15 parameters measured (three lenses x five parameters per lens) were found to fall within ISO-defined tolerances. Reproducibility was similar for the three lens types and was considered clinically acceptable. Practitioners and patients can be confident that the current generation of 1-day disposable lenses can be relied on to give consistent ocular and visual performance.