with a condenser for 18 20 hrs at room temperature the ingredients were reacted under conditions suitable to hydrolyze silane groups to form corresponding silanol groups thereby forming a covalent inorganic organic hybrid sio 2 resin a and additional silane were added to the above described preparation of resin b in the amounts shown below and the ph was adjusted to 7 5 8 with concentrated nh 4 oh the resulting composition was blended by stirring in a flask equipped with a condenser after which volatiles were removed at 50 60 c under reduced pressure to provide the u201c base resin u201d referred and further exemplified below viscosity of the final composition was very low approx 17 5 cps when determined using a brookfield lvf viscometer at 25 c the final product was a low viscosity e g lt 20 cps clear resin which could be stored at room temperature or frozen until further use polycarbonate lens stock was provided with a conventional acrylic primer layer see e g example 2 pct us97 07852 wo 97 45498 and the mixture was spin coated onto the primed polycarbonate lenses and cured in one pass through a uv cure unit using a medium pressure mercury h bulb total exposure was 1 4 joules the coating thickness was 4.