Contact lenses are an ultimate choice if you don’t wish to wear your spectacles. It improves your vision in the long run as it modifies the light rays. As a result, the complete focus of the light is onto the retina. It is suitable for both shortsighted and long-sighted people, but there is a difference on how each one works. For nearsighted people, light rays focus on the retina too fast as its placed in front of the retina and not directly on it. Both glasses and contact lenses correct your nearsightedness as it diverge light rays. This in turn decreases the focusing power of the eyes. The focus point here moves backward. As far as farsightedness is concerned, there is no much power for focusing as the light rays aren’t formed when it reaches the retina. Glasses and contact lenses work to improve farsightedness as it converges light rays. This way the focus power of the eye is enhanced as it moves forward on the retina.
How contact lenses work?
Eyeglasses and contact lenses have a significant role in correcting vision. If you want to get rid of the hassles of using these on a daily basis, you can go for http://www.newvisionclinics.com.au/patient-information/laser-eye-surgery-melbourne/. There are renowned specialists, you can seek advice from. As far as contact lenses and glasses are concerned, contact lenses are thinner and smaller in size. They rest on the eyes directly and hence it is thinner unlike glasses which rest few millimeters away from the surface. The optical zone of lenses is the overall surface of the lens. It is just a part of the lens that surrounds by fitting curves without affecting your vision.
Thickness of contact lenses
Contact lenses rest on the cornea directly and hence the optic zone is more or less of the same diameter of the pupil. However, the diameter size of the eyeglass lenses is greater when compared to contact lenses. As a result, it makes the contact lenses thinner than the eyeglasses. The lenses of eyeglasses are made thicker so as to ensure that it does not break. The eyeglass lens for nearsightedness normally has a thickness of 1.0 mm or more at the center to meet the guidelines. Contact lenses on the other hand, are made thinner, especially the soft lenses for near shortsightedness and the thickness is below 0.1 mm. Through cost of laser eye surgery, the contact lenses can be fixed permanently on the retina.The position of wearing contact lenses, its optic zone and the actual thickness is what makes contact lenses thinner compared to eyeglasses. Therefore, there is a lot of scope given to contact lenses today as it’s a convenient option than wearing those big eyeglasses daily.