I've had cataract surgery in both eyes and my distance sight is pretty good. My close vision is lousy and worsening. I too am a firm believer in Crimson Trace lasers and have them on every gun I carry, for several reasons.
1. I can focus on the target and see the red dot telling me I am on target without even looking at the sights. In a deadly encounter, to be sure, you will be focusing on the bad guy, not the front sight. I guarantee it.
2. In low light or darkness, when you can't see your sights, you can still be on target with the laser. Of course some chippy will say if you can't see your target, you have no business shooting. I call bee ess on that. Low light encounters happen all the time, robberies on the street, drive bys, home invasions. I have personally confronted dozens of bad guys at night and wished I had better tools to defend myself. (I'm retired LEO.) Someone else will mention battery failure, I'm sure. I change the batteries in my lasers when I change my batteries in my smoke alarms, spring forward, fall back. Small price to pay for insurance with your guns.
3. Unconventional shooting positions. I teach the class required for concealed carry in Kansas. I had one fellow with Parkinson's but we got him qualified with a Ruger .22 with a CTC laser grip on it. Another elderly fellow had been gored by a bull in his right shoulder and couldn't raise his dominant hand above waist level. He qualified with the same .22 shooting from the hip for the entire 25-round course. He said his personal carry gun was in the shop but he had a laser on it for the same reason.
4. Look ma, no glasses. There is a real possibility of being in a gun fight without any glasses at all where you absolutely won't be able to see your sights up close. If you wake up with someone in your house, what are you going to grab first, your gun or your glasses? If you are in an encounter on the street that involves some physicality, think Trayvon here, odds are good your glasses are going to be knocked off your face. You may still need to use your gun after that.
It's not all about the sights. Point shooting is also a good skill as well, particularly for up close. As our generation gets older, we all need some help hitting what we're aiming at. I think the laser is a wonderful aid and Crimson Trace are the best since they turn on with a proper grip on your pistol. This is of course my opinion. YMMV.