I really need the answer.
213327
Depends on which ones.  Some are phosphenes--they're made more visible by pressing on the eyeball, but that can be harmful to the eyeball--do NOT do it!  Others are simply afterimages--artefacts of how the eyes process incident light before sending the signal to the brain.
46041
that is a really good question, wish i knew tht one
480747
sorry i dont understand the question
240254
I'm sorry ... i dont know the answer .
411202
I'm not for sure but I want to hear the answers to this as well \n\n\nGod Bless.
240189
can you elucidate it a little more please?
333652
Does anyone know? I doubt it.
3353
Let's resolve this overdue question by bringing it to a vote.
658327
i hv one see if u can answer
190490
Finally someone has the guts to ask this! I really can't answer the question but I agree with what your saying.
46948
i dun understand the question...
365800
I really don't know, sorry
228266
ok\nu got the answer\ncheers
542573
Sorry I relly dont know, but tell me
557722
I don't know. Good question.
339184
I don't know, but I would like to know the answer to this question also.
326201
I dont understand the question