Need to remove moisture in the headlight lens. on 2003 Ford Crown Victoria

The headlight on the left side still works.My concern is the moisture inside the lens.How can this be fixed without neceassry replacing the entire headlight?

Some moisture in a sealed headlight lens is not uncommon. Headlight lenses are vented and the head generated when the lights are on will usually cause the moisture to evaporate. Any thing more that slight condensation is most commonly caused by a crack in the lens or it's housing. If you can find the crank you may be able to reseal the lens but in this case the best repair is to replace the lens.
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Just drill a couple of 1/4 inch holes on the bottom of the headlight assy. Unless you have the funds to replace it.