Dental Composite Materials for Direct Restorations by Vesna Miletic

Author:Vesna Miletic
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham

Despite being called “blue,” “green,” and “red” cone cells, each type of cell does not sense only one color, but a broad range of wavelengths in various degrees of sensitivity. Because of this, different specific selective cones can be stimulated by similar wavelength spectra, but in different levels. Thus, when the cone cells are exposed to a certain wavelength spectrum, the most sensitive cone cell for this specific wavelength spectrum is stimulated first.

However, as previously mentioned, when a specific selective cone is stimulated for prolonged viewing, it causes the fatigue of these cone cells. Then, the other color receptor, which is not fatigued, receives the stimulus and the brain incorrectly perceives the other color.

Human beings are capable of perceiving hundreds of shades equally; however, although findings are ambiguous, gender may have an influence on color perception [14, 15]. Thus, men and women may experience appearance of color differently. Generally, women are expected to experience more shades of color than men. What may be simple “purple” to a man could be “lavender” to a woman. Neuroscience says women are better at distinguishing among distinctions in color. On the other hand, linguistic researchers say that women possess a larger vocabulary of shades to describe color than men. But, women proved slightly better at detecting tiny differences between shades that look the same to men. The scientists believe the answer lies in the differences in men’s and women’s hormones that can alter development in the visual cortex. In contrast, children are more likely to sort the colors more randomly. However, the reason is probably due to the smaller exposure to color groups and general education of color.

The sensitivity of retinal cells declines with age, causing different shades of color to be less noticeable [16]. At the same time, certain neural pathways of the brain compensate it, so color perception remains constant over some time [17]. Because of this, color vision abnormalities are very uncommon in people younger than 70. However, as there is no treatment for this age-related loss of color perception, in mid-70s, dentists should be aware of this limitation.

Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.