What causes dipole-dipole interactions? The first thing required for there to be dipole-dipole interactions between molecules is for both molecules to have a dipole. These dipoles may be permanent (polar molecules) or temporary (instantaneous or induced dipoles in non-polar molecules). Polar molecules have an asymmetrical electron cloud/charge distribution.
Answers (2) 1  The abnormal growth direction of the eyelashe is generally called trichiasis. For children and teenagers, the cause of trichiasis is usually the abnormal growth of the epiblepharon and the epicanthus, or the congenital eyelid introversion. 2  That your eyelashes turn inward means you are suffering from trichiasis. If your eye lashes grow inward, you will feel uncomfortable because that the eye lashes are coarse. Trichiasis is usually caused by entropion, blepharitis, eye injury, distichiasis and idiopathic.
1 Eyelash problems. 2  Blepharitis can cause your eyelashes to fall out or grow abnormally (misdirected eyelashes). 3  Eyelid skin problems. 4  Scarring may occur on your eyelids in response to long-term blepharitis. 5  Or the eyelid edges may turn inward or outward. 6  Excess tearing or dry eyes.