Contact Lenses

For some people, image can be everything. Take Paris Hilton, for example, who is not content with being young, rich and beautiful; she also want to join the blue-eyed blonde bandwagon. Unfortunately, her natural eye color is brown. So she wear blue contact lenses.

         But then again, let's consider the people on the other side of the grid-people suffering from vision problems. Of course, they may opt for glasses but for convenience, most of them prefer wearing contact lenses. Aside from the cosmetic advantages, contact lenses do not steam up and are more suitable if the wearer engages in a lot contact sports. Driver with poor eyesight, in particular benefit more from wearing contact over glasses since the former offers a wider field of vision  than the latter.

Contact lenses are sometimes tinted to make them more visible

when immersed in cleaning solutions.

         Adolf Eugen Fick, a German physiologist, is credited for having constructed and fitted the very first successful contact lenses in 1887. Made from heavy Brown glass, the lenses can only be worn  for few hours at a time as they were very large  and difficult to wear. It was not until the 1960s  with the development of  hydro gels that the contact lenses we see today became so popular among the masses. Compared to glass lenses, the soft gel variety are kinder  to the eyes , allowing oxygen to seep through the material. As of 1999, the most  recent development came in the form of silicone hydro gels, which can be used for daily and overnight wear.

Seatbelt

Car safety is synonymous to wear a seat belt. According to a safety belt study conducted By James Madison University in the United State (US), "wearing a safety belt is the best defense a motorist can employ against the unpredictability of a drunk driver's action."

          During an accident, seat belts minimize injuries by preventing the wearer from being thrown out of the vehicle or from crashing with  the hard surfaces of the car's interior. Most seat belt have locking mechanism that provides for extension and retraction. During normal conditions,a passenger can lean forward easily while the belt stays in place. However, during a crash, the belt will tighten up to hold the wearer in place. Today, newer seat belts come with a pretensioner, which is set to actually pull in on the belt in the event of a collision. Pretensioners work electronically.

Both straps should be snugly fitted to the wearer.

This ensures that upon collision, the impact is transferred

to parts that can handle it-The hipbones and shoulders.

          The invention of the seat belt is being credited to George Cayley, an English baronet, consider as the Father of  Aviation, in the 1800s. Seat belt became popular around 1930s when they became common feathers in air crafts.