Blind Betta

[ReiRei]

I've noticed recently my female betta keeps hanging around on the gravel of the tank, acting listless, but in the past few days she's lost her sight. She'll only eat if I press the flake gently against her mouth, and even that is difficult. Water parameters are fine, and so are the other fish.
Tank is 90litre
 
Also, her fins are looking nibbled , which might be the other fish picking on her but I'm not sure.
 
Ideas?
 
And is it safe to place her in a safer tank? (Thinking in the fry tank, she wont eat the fry. )
And her eyes are not looking cloudy.

 

[Wildbetta]

Do you have a pic?  What is the temp of the tank?  What tank mates does she share the tank with? 
 
I personally would remove her from the tank into something that is a temporary place for her to heal.  I would not put her with any other fish since you have no idea at this point on what is the issue.

 

[ReiRei]

80 degrees
I can get a pic, yup, but she really does look normal.
Her tank mates are platys, mollies, plec and swordtails. Since she's become unwell, I've seen a few platies nip her - but this has only been happening since she developed whatever this is.
Just got to get out of work clothes, and I'll post a pic
 
I have no empty tank, nor room for a new one. Would a breeding trap be a good idea just to keep the other fish away from her?