While Clark thinks he's trying to cope, his ability not to be able to ask for help (and assuming he can still do what he had done with sight without practice) only shows that he isn't coping. He's so used to taking care of others, he hasn't learned how to allow them to help him. I'm sure having Clark show up blind isn't the way he wants to tell Lois that he's Superman. Also, Lois may be the only one who know about Superman's predicament (at this point) but if Superman keeps flying around blind others will notice it as well. The only way to go forward (blind) as Clark would be to have Superman disappear or be seen rarely. It's a good thing his loss of vision was only a temporary condition.
