The optical device is an invention that has changed humanity
An optical device is a device that convertsradiation due to the lenses of which it consists. Modern science has gone so far as to invent a huge number of optical instruments, the most famous of which are glasses, a microscope, a camera, a telescope.
Glasses - the main sphere of application of lenses
But, perhaps, the most popular application of propertieslenses is the use of them in glasses. Optical glasses correct vision, increasing its sharpness. Therefore, before you buy a pair of lenses in the frame, you should consult a doctor for professional advice on what kind of diopters you need. Even if you conducted a computer study, and according to its results you have an approximate idea of what optical device you need, you should not buy them without consulting the oculist. After all, a doctor can advise glasses with other units of measurement of the optical power of lenses to stimulate the work of your eyes. Also it is not recommended to purchase glasses in random places - in markets or street counters. If you wear glasses with "wrong" lenses, the process of adaptation of the eyes begins, when the body compensates for the distortions of the glasses by overwork of the eyes, headache and further deterioration of vision.
Protective glasses
There are special devices that are designedRestrict the retina from negative external influences, for example, glasses for working with computers or driving. But these are not optical devices, because their glasses have a special coating that converts the image. Sometimes people with visual impairments can order safety goggles with optical lenses - these devices will not only correct vision, but also take care of their protection.
Science has moved far ahead, and in 2010American scientists have developed a tool to combat blindness in the elderly - an optical device that is built directly into the retina of the eye. This tiny telescope compensates for the damaged areas of the eye, and the healthy part of the eye continues to be responsible for peripheral vision. The brain reduces the received data in one picture - and the person sees a full-fledged image.
The invention of an optical microscope
In the early 17th century Galileo invented the simplestthe optical device is a magnifying glass, thanks to which it was already possible to observe the activity of microorganisms. Since then, of course, the optical microscope has undergone significant transformations, and today it already has two astigmatic lenses that do not distort the image under strong light refraction, but give an objective picture. A modern microscope connects to a computer using a USB connector, so it almost does not look like the invention of a brilliant Italian, but it has the same principle of work in its basis.
Optical devices were invented in order to facilitate everyday life of ordinary people, help them to consider what is not always able to see the human eye.
