variable focus lens meaning in Hindi

Examples

1. Among Graham's other accomplishments were participation in developing a low-vision spectacle, introducing reflection-reducing coating for ophthalmic lenses, developing colorless ultraviolet absorbing lenses and inventing the variable focus lens.
2. In 2007 Wil and Lucas Newman wrote a new algorithm that did not require cameras with variable focus lenses, thus pioneering blurry one-dimensional barcode reading ( " reverse image deconvolution " ) using ideas from Belgian astronomers.