Contact lenses, lenses that are worn directly to the eye to fulfill optical, cosmetic or therapeutic purposes. Optical lens contact lenses correct the refractive fractures by myopia, short sightedness and building defects and may replace glasses . Contact lenses also relieve visual disturbances of irregularities in the corneal surface that cannot be corrected with spectacles, e.g. by keratoconus . For users in need of distance and reading correction in the same lens, contact lenses have been formed that contain two strengths.
The right Choice of the Contact Lenses
Colored contact lenses can reduce the light glare that may occur in the rainbow bowel. The same contact lens types can be used cosmetically to hide stinging scars in the cornea or to cover one pupil at double vision. Other types of colored contact lenses are used to illuminate a different color of the rainbow. In case of painful eye disorders, contact lenses are used to protect the eye. Using contact lenses can also be used to prolong the effect of drugs in eye drops.
The right Properties
The contact lens properties (hardness, firmness, durability, surface, oxygen permeability) are determined by the contact lens material, partly by design and dimension, especially thickness. It is usually easiest to get used to soft contact lenses, but treatment of keratoconus requires the use of hard lenses. Some types are small and swim in the cornea on the cornea, others reach beyond the cornea and rest on the mucosa above the esophagus of the eye. Most contact lenses are removed at night. Some types of soft lenses with high permeability to oxygen may remain in the eye for extended periods of time, but the risk of infection is increased. In addition to the manufacturer and lens type, contact lenses are identified for optical use of the dioptric strength, the diameter in mm and the rear radius of curvature in mm.
The Proper Usage
Contact lenses can be used regardless of age. Compared with lenses, contact lenses have optical advantages. This is due to the distance between the eye and the corrective lens edger , resulting in an optical magnification that depends not only on the distance but also on the lens’s strength. The greater the strength, the greater the optical advantage that contact lenses will entail compared with spectacles. Among the benefits of using contact lenses, the freedom of glasses plays a significant role, especially among younger and athletes. However, the use of contact lenses involves the risk of eye inflammation , and the health authorities have introduced special authorization for opticians.
Contact lenses made of thin glass appeared in the late 1800s, but the modern contact lenses began in the late 1930s with the introduction of the hard plastic materials. In the 1960s, the soft water-resistant plastic contact lenses appeared. These are the things that you can think of now and that is the reason that you can hope for the best result. There comes the best opportunities and so you should be specific on that.