Contact lenses are the best means to correct vision defects in a comfortable and effective way. However, there are still few information regarding contacts, so that individuals are often undecided whether it is convenient for them to wear contacts in order to solve their problems. Therefore, a brief dictionary with the most important terms with respect to contact lenses and optical items is presented below, with the aim of helping people with vision defects to learn more about contacts.
Contact lenses, also known as contacts, are the most effective means to correct vision defects. Contacts are applied on the surface of eyes. Therefore, they are manufactured in modern materials that provide users with keen vision and better eyes, without endangering the health condition of users. It is necessary to consult a doctor prior to purchase any pair of contacts.
Spherical contact lenses - myopia and hyperopia
This type of contacts are intended for nearsighted and farsighted individuals. Nearsightedness, also known as myopia, appears when individuals have a keen vision from near and a blurred one from afar. On the contrary, farsightedness, also known as hyperopia, occurs when the vision is keen from afar and blurred from near at the same time. Spherical contacts correct both nearsightedness and farsightedness: on the one hand, nearsighted people need spherical contacts with negative power, whereas farsighted individuals need spherical contacts with positive power.
Toric contact lenses - astigmatism
These contacts correct astigmatism, the most popular vision defect that occurs when the cornea gets the shape of a football ball. Astigmatism can occur along with nearsightedness and farsightedness. Toric contacts create different focusing powers on both the vertical and horizontal orientation. The vertical orientation helps correct astigmatism, whereas the horizontal orientation corrects other types of vision defects tied to astigmatism, such as nearsightedness and farsightedness.
Multifocal contact lenses - presbyopia
They are also known as progressive contact lenses, are intended for the correction of presbyopia, a natural problem of vision tied to age that almost anyone encounters at the age of 40. Presbyopia occurs when individuals lose the ability to focus clearly small objects close to eyes, such as newspapers. Multifocal contacts provide users with keen vision without worsening their external look. In particular, multifocal lenses are made of three parts. While an upper part is realized to correct the vision from afar, a lower part corrects the vision from near. Finally, the middle part corrects the vision from the middle distance.
All types of contact lenses, except the daily contact lenses, require a daily treatment through special care solutions for contact lenses. Care solutions for contact lenses are also needed to clean and disinfect the lens case in which contacts must be stored and treated at least once per day. It is necessary to treat both contacts and lens case daily, in order to avoid any risks of irritation and infection.
The majority of care solutions for contact lenses available within the market are multipurpose. Multipurpose care solutions for contact lenses, also known as multi-function solutions, clean, disinfect and rinse the contacts at the same time.
One more means to get a better vision are eye drops. Eye drops are intended for both people that suffer from the dry eye syndrome and users of contact lenses that wear contacts with a low degree of hydration.