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.
An optometrist should examine any child older than 4 months whose eyes do not appear to be straight all the time. Strabismus is classified by the direction the eye turns: Inward turning is called esotropia. Outward turning is called exotropia. Upward turning is called hypertropia. Downward turning is called hypotropia.