During the present era as a result of rapid advancement in the field of electric, electronic and computer technologies, the eyesight of people related to these fields are definitely effected. People whose eyes have refractive errors do not see clearly without spectacles, for the reason that the light emitted from the things they are observing does not come into focus on their retinas. For people who are farsighted, images come into focus behind the retina; for people who are nearsighted, images come into focus in front of the retina. For both, the result is a blurring of vision.
A pair of spectacles according to an embodiment of the present innovation is consisting of a frame, lenses fixed in the frame, coupling pieces pivoted to two ends of the frame, and two temples joined to the coupling pieces correspondingly. The coupling pieces are stretchy and flexible, and each have a holding hole on a rear end, and a detainment hole on a lateral side thereof, which communicates with the holding hole. Each of the temples has a joining section and an entrenched projection on a lateral side of the joining section. The temples are each joined to the related coupling piece with the joining section being received in the holding hole, and the embedded protrusion being embedded in the detainment hole of the coupling piece. In use, the coupling pieces make turn externally by the wearer’s head, and make the temples pressed against the wearer’s head in order for the eyeglasses to be firm owing to their resilience. At the same time, the frame of the eyeglasses can’t be caused to bend by the wearer’s head even if the wearer’s head is comparatively large. Therefore, the focal distance between each of the wearer’s eyes and the corresponding lens can’t be changed, and the eyeglasses can help the wearer’s eyesight in a reasonable mode.
Eyeglasses and contact lenses are devices that correct refractive errors in vision. Spectacles lenses are mounted in frames that are worn on the face, sitting generally on the ears and nose, so that the lenses are placed in front of the eyes. Contact lenses appear to be worn in direct contact with the cornea, but they in fact glide on a coating of tears that bifurcate them from the cornea.
The function of spectacles and contact lenses is to correct or get better the vision of people with shortsightedness (myopia), farsightedness (hyperopia), presbyopia, and astigmatism.
Eyes are examined by optometrists (OD) or by ophthalmologists (MD or DO). Prescriptions, if essential, are in that case given to patients for spectacles. Eyeglasses are normally made by an optician. A separate contact lens-fitting exam is compulsory if an person desires contact lenses, because an eyeglass prescription can be different from a contact lens prescription. There are uncountable variety of the modern and beautiful eye glasses, however, the pictures of some of them is give below:
