We've been swamped with suggestions for the contact lens wearer who's suffering from dry eye. You could say there isn't a dry eye in the house, or there won't be once she's tried your recommendations.
One woman wonders if it's an indication for arthritis, so that could be worth checking out, while another thinks it could be a symptom of the menopause. One person, who also had to give up on contact lenses, started using Viva-Drops, a natural lubricant that contains antioxidants. Trouble is, it's not available directly in the UK, but can be ordered via Vision Pharmaceuticals in South Dakota. She could also try the supplement NAC (N-acetylcysteine). Hemp oil supplements can help, as can DHEA supplements. Try hot compresses, such as with tea bags or damp cottonwool balls, then gently squeeze with finger and thumb along the lower lids on the rim. Try the same on the upper rim, but if this is painful, you can press and massage it.
Try the homoeopathic remedy Nat Mur 6C or 30C or Aconite 30C, or Oculoheel homoeopathic eyedrops. Another remedy, from the conventional side, is Occuvite by Bausch & Lomb, which contains a small amount of lutein. But one enterprising correspondent decided on a self-help remedy and found lutein 45 mg tablets in his local pharmacy, which stopped his eye from involuntarily closing, drying and flickering.