Yes, they can. In astigmatism, the eye is not perfectly round, so normal soft lenses don't work as they curve to fit the shape of the eye.

If the astigmatism is light, then a rigid gas permeable lens can sit on the front of the eye as the round shape of the lens corrects the vision.

A special lens called a 'toric' lens (available in soft or rigid gas-permeable materials) can correct astigmatism. These lenses can be made to correct higher levels of astigmatism than an ordinary gas-permeable lens. Several manufacturers now make toric lenses; your optician can advise you on prices and availability.