PhysAd and Essence-loss, best approach Options

[KawikaKeAloha]

i have been playing two runs with my new character (a physad). the first was an easy one which earned me 5 karma. then came the second run. a very very deadly one, which earned me unbelievable 42 karma!!! no my gm is not insane, but the run was very long, very deadly and i just happened to help all my group over and over again.

anyway, my problem is that i lost my eyesight, because of some nasty critter. my gm pointed out that i CANNOT genetically repair my eyes or implant other genetically produced eyes. which leaves me only one option: cyberware.

since i have the sensitive system flaw, i need to pay double essence-costs for the eyes.

what should i best do? i thought of initiating once and buy a magic point for 20 karma, learn physad-powers and put geasa on these for the loss of my cyberimplant? would this be an ok approach? i really don't want to put double-geasa on my powers, since i am already very crippled.

another question i couldn't find an answer in my books are:
if i have natural (not adept power) lowlight vision and i have to replace my eyes with cybered implants, am i still able to use lowlight vision? if yes, do they still count as natural or cybered (in regards for TN).

thanks