1 These thio relaxers have a gentler action than other relaxer chemicals, so are a popular option when you want effective straightening with a lower risk of damage to the hair. 2  Japanese straightening systems use thio based relaxers.ons. 1  As the name suggests, this technique relaxes hair rather then leaving it poker straight, so if you want absolute stick straight and frizz-free hair, this method may not be for you. 2  As with every chemical process, the ever present risk of damage is there.
Types of Optical Illusions. There are currently three types of optical illusions: literal illusions, cognitive illusions, and physiological illusions. Each of these illusions trick our brain into misunderstanding what we see in various ways. A cognitive illusion happens when the brain perceives an object based on prior knowledge or assumptions.
An isometric illusion (also called an ambiguous figure or inside/outside illusion) is a type of optical illusion, specifically one due to multistable perception. Jastrow illusion. The Jastrow illusion is an optical illusion discovered by the American psychologist Joseph Jastrow in 1889.