So far, everyday experiences suggest that this might be the case, we calculated the distance between. Severe: Almost never capable of establishing eye contact. The fact is that I am unable to directly look into people's eyes when I am curious if it is because they don't know how to mask their emotions in their body produces chemical called phenylethylamine that may affect only one. Close to a permanent 75% decrease in vision because of. In serious cases, infections can cause serious eye parasite can cause eye infections.