Jayfeather does not and will not regain his eyesight.However,he can see in his dreams and visions(I mean when he looked into Ivypaw's thoughts of her killing all of Thunderclan).
Sorry,that was a spoiler.
"Blink" (?)
You will lose that heightened response in due course of time. This is the normal course of action. There can be exceptions to this.
Yes, but it depends on the conditions of the why the eyesight was damaged. Some of the new laser surgeries can repair eyes depending on the problem.
Jayfeather's parents are Brambleclaw and Squirrelflight!
Jayfeather Jayfeather He doesn't have a warrior name, just a Clan name which is Jayfeather. cool, huh?
Crowfeather is Jayfeather, Lionblaze and Hollyleaf's father.
Breezepelt told Jayfeather that he would make him pay for his actions. He expressed anger and hostility towards Jayfeather during their interaction.
Jayfeather belongs to ThunderClan and his parents are Leafpool of ThunderClan and Crowfeather of WindClan.
Jayfeather is a medicine cat so he is forbidden to 'like' anyone.
Lionblaze and Hollyleaf are the two Clan cats who have a strong bond with Jayfeather in the Warriors series. They are his littermates and support him through his challenges and adventures in the story.
No just no Jayfeather was furious when he found out that Leafpool was his mother even though she was a medicine cat. Also Jayfeather was mad when he found out that Yellowfang had a son, and really Jayfeather and Cinderheart? come on people Jayfeather is a medicine cat he would never take a mate besides Lionblaze loves Cinderheart.
Take it to a qualified vet for an examination and find out. Unqualified people on a question and answer site cannot be expected to provide an accurate answer, especially when given so few details.