ZEISS lenses for Children aged 7-9 Years Wearing, Zeiss MyoCare RX Lenses eye length growth comes 63% on average Closer to that observed in Normal - Sighted Children of the Same age. Zeiss Warranty :- Get Your Zeiss MyoCare Lenses Replaced For Free If Power Changes by More Than 0.50 D Within 9 Months of Purchase Zeiss Resultant Power index 1.59, Dia-65 power -9.00 SHP to 6.00 CYL & index 1.59, Dia 70, Power -7.00 SHP to 6.00 CYL.