@lioness thanks... will see if i can get locally , now i know i have deficiency would like to start asap.... hope it helps even a little bit.... 9pm now so probably choose a you tube and turn out the lights... i saw webinar by specialist on glaucoma drops last week and he said put latanoprost in half hour before sleep... i have been putting it in and closing my eyes for the night.... thought i would mention as you take it too, night j.