Bill Cosby is now “completely blind,” said a well-placed source, who added that the embattled comic is “in his own personal hell.”

The disgraced comedian once known as “America’s Dad” is now confined to his Pennsylvania home with only his incomprehensibly loyal wife, Camille, at his side.

The source close to Cosby told us, “His alleged victims may take some solace in the fact that he’s in his own personal hell. He has been suffering from a degenerative eye disease and is completely blind . . . All his Hollywood friends have turned their backs on him.

“He is confined to his house in Pennsylvania, and the only person on his side is his wife, Camille, who is masterminding his defense. His only friends are the small army of lawyers on his payroll.”

Although his top lawyers, Brian McMonagle and Angela C. Agrusa, didn’t respond to questions from Page Six, Cosby’s sight has been slowly fading for some time. In January, Monique Pressley, another of his lawyers, said of his strange appearance in his mug shot, “He’s a 78-year-old blind man who they’ve chosen to charge. That’s not a defense to a charge, that’s just a fact.” It explains why he is led into court by lawyers and reps on both of his arms. (He turned 79 on July 12.) Since then, the condition has become far more severe.

Cosby reportedly has a degenerative eye condition called keratoconus, a condition that causes the eye’s cornea to bulge.

A judge this month ruled that Cosby will stand trial on sexual assault charges, at a date yet to be determined. Cosby faces three counts of felony aggravated indecent assault from a 2004 case involving Andrea Constand, an employee at his alma mater, Temple University. She was the first of more than 50 women who’ve accused Cosby of sexual misconduct.

But, on Monday, a judge in his civil case ruled Cosby will be allowed to sue Constand — who claims he drugged and raped her in 2004 — for allegedly breaching a confidentiality agreement she signed with him after he settled with her out of court in 2006.