Stenopeic vision is sight through pinholes. It is a concept that involves the use of special glasses for correcting vision problems. As such, it is usually not referred to as a type of vision at all, but as a way for dealing with sight impairment. Stenopeic glasses have tiny pinholes in them instead of the traditional lenses used in most corrective glasses. In fact, these glasses aren't glass at all; each lens is made of opaque plastic.
Stenopeic vision glasses are used in an entirely different manner to correct vision. They work much like a pinhole camera, permitting only a very narrow light beam to enter the wearer's eye. This is said to improve vision depth and reduce the circle of confusion in the retina. These changes in vision are said to improve vision overall.
When a person's vision is uncorrected, entering light beams are not focused on the same location in the retina. Some rays of light need more focusing than others in order to provide clear sight. This can lead to eyestrain and damaged vision. Under the stenopeic vision concept, there are only some light beams that are permitted to focus on the retina; this corrects blurred vision and makes it easier for clear images to be obtained. Since there are many pinholes in stenopeic glasses, the wearer can see many clear images, and the eyes don't have to strain to focus.
Stenopeic vision glasses may be used for people who are near-sighted and far-sighted. However, they should not be used for correcting vision for a person with more than six diopters of nearsightedness. There are also some drawbacks to wearing these glasses. They are said to reduce brightness and impair peripheral vision. As such, they are not recommended for use while driving or operating heavy or dangerous equipment.
Some companies claim that stenopeic vision glasses can do more than simply correct vision while they are worn. They claim that they can actually improve uncorrected eyesight permanently. However, this improvement requires the performance of eye exercises on a regular basis. Some companies also assert that these glasses can even serve to reduce the eyestrain typically experienced by those who stare at their computer monitors for long periods at a time.
Stenopeic vision glasses can be used for correcting vision, even small impairments, at any age, but they are often used by people who need reading glasses but would prefer a more natural solution. Parents may also buy them for small children who cannot see classroom chalkboards well. They may prove helpful for viewing entertainment at a distance, such as movies, plays, and concerts. They can also be worn to see tiny print on food labels better.