Evolution of human colour vision lights, which appear to be clear. Other colour perception issues include having trouble distinguishing yellows from reds and violet, lavender and purple from blue. In other cases, objects that reflect both red and blue light may appear to just be blue to these individuals. Deuteranopes, who are missing medium wavelength sensitive cones, are similar to protanopes in that they cannot distinguish between colours in the green-yellow-red part of the electromagnetic spectrum. However, deuteranopes do not suffer from dimming issues. For example, purple colors are not seen as being opposite to other colours in the spectrum but instead appear to be
Eye contact decreases. Maternal sensitivity was also shown to be stable over time. According to the study, these findings may potentially be based on the assumption that sensitive mothers are more likely to notice their child’s behavioral problems than non-sensitive mothers. Some people find eye contact difficult with others. For example, those with autistic disorders or social anxieties may find eye contact to be particularly unsettling. Strabismus, especially esophoria or exophoria, interferes with normal eye contact: a person whose eyes are not aligned usually makes full eye contact with one eye only, while the orientation of the other eye deviates slightly or