Light sensitive tissue lining called vertebrate retina isplaced in the inner eye's area. The image we receive is due to the eye opticsthat works in the same manner as the camera film. The nerve impulses are triggeredby the electrical and chemical events, which are provoked by the lighting bouncingof the retina. Brain receives these nerve impulses by the optic nerve andfibers. The retina is a part of the central nervous system and it can be non-invasivelyvisualized. There are few layers of neurons, of which this complex structure comprises. Synapses are interconnected in this structure and photoreceptor cells ofthis structure are the light-sensitive neurons. Cons, which are responsible forcolor perception and vision during the daytime, and the rods, which areresponsible for the black and white vision and dim light vision, are two typesof these cells. There is a third photoreceptor, which is responsible for thereflexive response associated with the bright light and it is calledphotosensitive ganglion cell.
Retin-A is maybe the best ingredient included in theanti-aging products, due to the generic formulations and strength of theproducts given by prescriptions. Retinol is the same thing as Retin-A, but it isa bit milder and it can be found in department stores and drugstores. Wrinklesare one of the biggest problems among women, and dermatologists are looking foran ingredient that will eliminate this problem. Retin-A is probably theingredient which is associated with every successful product on the market. Wecan say that advertisements regarding the efficacy of the products that do not have this ingredient are probably not true. Acne problems were the focus of the scientists who included the Retin-A inthe treatment of this problem, and this was 20 years ago. In this time, it madethe skin glow, smooth and improved the skin texture with reduced wrinkles andspots. There is regeneration on the cellular level of the skin and this is the reasonfor such excellent results.The cellular level is what the retinol works on as well and its regular use will surely increase the collagen production, which provides the firm and elasticskin. Collagen is very important in the fight against aging and it can reduce wrinkles. Retin-A is really efficient and it will reduce the chances of developingblackheads and whiteheads because it prevents the clogging of the skin pores.Some studies have even shown that after two years of retinol use, you can eventreat precancerous skin cells.