Patent AU-2013216695-A1 (AU)
Title: Usage compliance indicator for contact lenses
Inventor: SPAULDING RUSSELL T
IPC: G02B1/00
Filed: 2013-08-19
Abstract: An ophthalmic lens incorporating a usage compliance indicator may be utilized to indicate when the lens should be discarded or otherwise treated. The usage compliance indicator comprises a material that is clear when the lens is removed from its packaging and transforms to a visible marking over a given period of time corresponding to the manufacturer's suggested usable time. The material is compatible with the lens material and does not interfere with the optics. ................ ............. * - ........... ................. ............... ............ ................. ... ............ ................. .............. .. ......... ...... ........ .......... ..... ............ .................. ***** ...... ......... ............. * ............................ ............ ...................... ........ ................... ...... - ** ..................................................... ............................................................... .............................................................. ............................................................ ........................................................... .......................................................... ........................................................ ...................................................... .................................................... ..................................... * * ........... ............................................... .... .................. *** ................... ......................................... ...................................... ................................. ............................. ...................... 100 ........... ........................................... ............................................................. ...... ******* .................................................. .. .............................................................. ..... ........................................ * ............... . ................................................. .... ........... .......................................... ....... ............... ................................ ..... **** .................... ................. ............... ............................ * * ..................... ............................................................... .............................................................. ............................................. -............. ............................................................ ........................................................... ........................................................ ............................ *** ........................ .................................................... .......................... ****** ................... ..... ......................................... .. .................... , ..................... .......................................... .................... , .................. ................................... ............................... ........................ 10 0 ................