Anyone have any experience of this please? My DS2 started repeatedly blinking last week whilst on holiday, its quite an exaggerated blink too, the sides of the eyes really come forward. We thought at first it was either tiredness or the change of environment to a salty sea air, but it has continued now we are at home. Could it indicate a problem with his eyesight? Or could it be a tic? DS 1 had a winking tic which has changed recently to a clearing throat one, but DS2 seems quite young for this? Doctore? Optician? Thanks