I don't know what to say here.
Why do you think that a "supposed problem as you've not seen something 'proven' (there's that word again) to your satisfaction (is that possible?)" is an issue for Evolution?
Not a problem for Evolution.
When you find evidence that contradicts evolution then it is in trouble.
First, the development of eyes were considered to be "show stoppers". Now we have very good understandings how eyes can form and as we have noted, there are several different ways.
Here's a question for ID. Any engineering student would know NOT to put the blood supply through the part you want to receive light, yet that is what is going on with the mammalian eye! The Squid's eye doesn't have that flaw. Yes, flaw. As the blood must come through the back of the light sensitive regions and cause a blind spot. The Squid has no blind spot.
Why would any designer produce such a flaw?
Ah, now we see the dogmatism inherent in the belief system. Help! Help! I'm being indoctrinated.
I do not know what to call your attitude to this issue except invincible ignorance. You clearly don't require the knowledge of how this particular feature came about via evolution yet you are sure it is not a problem for evolution; evolution must have done it!
Do you want evolution to be the answer? If you do, please do us all the courtesy of admitting your faith. I reason, hope and believe that there is a loving and kind designer who created this universe. See, I can admit my faith, can you?
Would anything we found in biology be a problem for you? (please not that I used the word 'problem' not 'falsifier')
Shouldn't someone committed to science require evidence not merely understanding? Anyone can claim they understand something.
Now we have very good understandings how eyes can form and as we have noted, there are several different ways.
Ps. Lest anyone think my words were rude or unnecessarily harsh may I point out that the utter denial FrankH has attempted to spread here is contrary to honest discussion and examination and needs to be nipped in the bud.