Active systems are more complex than passive systems becausethey use infrared light sources. Since the infrared band falls outside thevisible spectrum, these light sources don’t cause oncoming drivers to sufferfrom temporary night blindness like high beam headlights can. That allows theinfrared lights to illuminate objects that are significantly further away thanheadlights are able to reach.Since infrared light isn’t visible to the human eye, activenight vision systems use special cameras to relay the extra visual data.Some systems use pulsed infrared lights, and others use aconstant light source. These systems don’t work very well in adverse weatherconditions, but they do provide high contrast images of vehicles, animals, andeven inanimate objects.Millions of people all around the world are struggling withtheir eyesight problems. In fact, eyesight problem is one of the most commonmedical problems in the world that can affect people from all age groups.
Children, teenagers, adults, old people, and even new born babies can have canhave eye-vision problems.Unfortunately,even though the medical science has evolved so greatly during the last century,we still don’t have a lot of options in providing permanent solutions to theseeye problems. The most common solutions given by doctors and physicians areprescribed glasses and contact lenses. However, these are not permanentsolutions to eye problems.
Glasses and contact lenses are definitely no curefor eyesight problems.They are simply tools that can help your eyes focus whenever you put them on,the problem itself is still there, so whenever you’re not wearing your glassesor contact lens you will still have problems in focusing your eyesight.Perhaps the only known permanent solution to these problems isthrough eye surgery. However, such medical procedure also has many defects.First, it’s not cheap.
Eye surgery does can help a lot of people gain backtheir eyesight, but it will also drain your savings. In 2013, the average costfor eye surgery was $2,500 per eye! That’s very expensive for most people. Thenthere are also risks associated with such medical procedure, including somenegative effects thight might occur due to malpractice or incorrect procedures.We often heard about people who took an eye surgery ended up losing theireyesight completely.