Scottish star Phyllida Law forces her actress daughters Sophie and Emma Thompson to undergo regular medical check-ups in a bid to catch early signs of glaucoma.
The 78 year old's mother, Megsie, suffered from the eye disease, which causes gradual loss of vision, and she was herself diagnosed with glaucoma in 1980.
But Law admits her worst fear is passing the condition on to her children.
She says, "To be honest, I'm grateful that my glaucoma was diagnosed relatively early and for the drops that keep my eyes healthy. I wouldn't want to lose my sight, but I don't like to know any details about the condition, or the prognosis. I'm not inclined to poke about or panic. But of course, I am concerned about my daughters...
"My concern is for my family - it is definitely passing through the maternal line. But they're good - they all go to the opticians for check-ups regularly. I tell them, you have to look after your eyes the way you look after your teeth - regular check-ups. It would be easy to put any changes down to old age, but glaucoma is serious and a major issue."