How to replace headlight lens 1995 Ford Taurus ?

No. You have to replace the entire headlight assembly. You can buy a new complete headlight assembly from rockauto.com for $120.

You replace the headlight assembly - they run around $75-$100 online for each side.
Sometimes you can refurbish them. There are Youtube videos showing the process.

Ford Taurus fuse block diagram
The standard fuse block. Fuses: 1 - a stoplight / a turning movement signal / the alarm signalling; 2 - a window wiper washer; 3 it is not used; 4 - front illumination, a parking light, a sound signal; 5 - the electronic block, the switch of heating of a rear screen, rear illumination; 6 - a washer and a rear screen wiper (versatile person), electric window regulators of radio and an illumination headlight; 7 - it is not used; 8 - hours, the tape recorder, internal illumination, the mirror electric drive; 9 - the defroster engine / the air air conditioner; 10 - a high beam; 11 - radio, a cassette tape recorder; 12 - ignitions, the relay of a sound signal and the sound signal; 13 - panel board illuminations; 14 it is not used; 15 - a stoplight, a lamp of illumination of number board and a body; 16 - memory devices of the block of devices; 17 - blocks of electronic devices, compressor clutches; 18 - precautionary light signals / a buzzer of seat belts.

Most Auto Stores sell a headlight solution that cleans the fogginess of your headlight. Assuming your headlight looks dirty and cloudy as would a pool, a simple solution is to pick up the cleaner at any auto place. That is a lot cheaper than buying a new headlight.

there are alot of replacement brands on the internet,,but there are alot of shop doing head light refinishing and its lifetime warranty,,,,looks good too also cheaper,,,call around to your local shops you should fine someone who does it,,,autozone and other stores sell kits to do it yourself,,,

Most headlights lens are sealed up to prevent this problem. A broken seal or a crack somewhere opened up to let in moisture.
You can drill a small hole on the lowest part of the plastic headlight housing to let the water drain out. Or, replace the plastic headlight assembly with a new sealed one.The plastic headlights turn yellow and cloud up over time (not because of moisture inside, because it's plastic getting ruined by the weather and the sun). This problem reduces headlights from putting more light on the road.
The only thing you can do with moisture inside the headlights is to drain out the water that builds up. The seals on the headlights are bad right now and are going to keep letting moisture in. I would replace the both headlight assemblies for new sealed, clear ones.

I also have a 95 yj and mine did the same thing just replace both headlight and it will be fine.
if u look in light and u see a dark spot in the beam then its that light but replace them both anyways not expensive at all..

plasik-magic sold at plastic suppliers

lift hood and then unbolt the headlight from the radiator support or the metal bar running along in front of the radiator!! If you dont see the metal bar then just pull the plastic out of the way and then you should be able to see the bolts and then remove the headlight and dont forget to unplug the bulb from the headlight!!