Clinton Portis is scheduled to visit with a concussion specialist in Pittsburgh next Monday, the final step in his return to playing football.
Portis has not played or practiced with the team since Nov. 8 when he suffered his concussion in a game against the Atlanta Falcons.
He has missed the Redskins' last three games and has been ruled out of this Sunday's game against the New Orleans Saints.
In his weekly radio appearance on ESPN 980 on Tuesday, Portis said that blurriness in his vision was the only symptom that needed to be checked by doctors.
"I wasn't having any headaches or any nausea or anything, I just felt like my vision was off," Portis said. "Once we realized it was a matter of getting my eyes back up to speed--I just left a doctor about 30 minutes ago and he cleared me and said I was fine, so now I just have to see the doctor in Pittsburgh."
Portis said he "would love to get out there and just finish out the season," but he understands that caution is necessary when it comes to concussions.
"I have to do what's safe and what's best," he said. "If I'm cleared and I can get back out there for the last couple games, then I'm definitely going to try to get back out there.
"If I can't, then I'll go into the offseason healthy and look forward to starting off fresh next year."
Portis said he was proud of how his teammates have responded to injuries--the team has nine players, including four starters, on injured reserve--and battled the Dallas Cowboys and Philadelphia Eagles the last two weeks.
"I don't think anyone is down and out because of who can't go on the field with them," Portis said. "As far as the locker room, the guys who take that field look forward to going out and playing and stepping up. You can see that.
"We're missing 7-8 guys and they still went out there and played the Eagles and Cowboys down to the end of the game. That speaks volumes for the talent and the character of this team. It's just a matter of coming away with a win."
On the Redskins' running backs, Portis said: "You look at Rock, nobody really hears about all of the work Rock puts in, but there's nobody who wouldn't choose Rock among the top 2-3 guys to go to war with, any day, any Sunday, or any other time.
"As far as Quinton [Ganther] and Marcus [Mason], I think they came in and played great. When you get an opportunity, you have to go out and take advantage of it."
-- REDSKINS SIGN D-LINEMAN TO PRACTICE SQUAD
The Redskins have signed defensive lineman Antoine Holmes to the practice squad, the team announced on Tuesday.
Holmes, 6-2 and 289 pounds, spent three weeks on the Arizona Cardinals' practice squad this season prior to being released on Nov. 24.
He originally entered the NFL in 2009 as a college free agent with the Minnesota Vikings. He spent the offseason and training camp with the Vikings before being released on September 5, 2009.
A native of Williamsburg, Va., Holmes played two seasons at North Carolina State after transferring from Lackawanna Junior College in Scranton, Pa. As a senior, he started all 13 games for the Wolfpack and had 35 tackles and two sacks.