Eventually everyone experiences presbyopia. This is the normal aging process of the eye, which begins around the age of forty for most people, and is caused by the gradual loss of elasticity in the natural crystalline lens of the eye. The lens loses its ability to change shape the way it used to, and fails to bring the light rays of near objects into sharp focus. Of course a nearsighted person over the age of forty can see near objects clearly with the naked eye, but will have difficulty doing so if he is wearing glasses or contact lenses that correct his myopia. Read the rest of this entry »
This is the most exciting stage for any new contact lens wearer. At last the moment has arrived when you get to know how they really feel, and what a thrill it is to see—and see yourself —without glasses. If you’re being refitted, you’ll be anticipating increased comfort and improved vision over your old pair of lenses.
You may be surprised to learn that fitting is an art in addition to being a precise science. Contact lenses do not fit your cornea like a second skin or the way a lid fits tightly on a jar. That would prove as uncomfortable as an overly snug garment or a tight pair of shoes; it would also prove unhealthy for the cornea. Read the rest of this entry »
The lens in your eye can only adjust so much in an effort to bring objects into focus. When the eye can’t focus properly, there are four basic conditions that may be the cause. These are called refractive errors (myopia, hyperopia, astigmatism, and presbyopia). Luckily, all are correctible with contact lenses or spectacles. Most of these refractive errors are a result of heredity.
Nearsightedness (Myopia). This occurs when the eyeball is too long for the lens’s focal capacity. The patient’s cornea and lens focus the image of a distant object in front of the retina, so vision is blurry except when looking at nearby objects. Myopia affects one quarter of the world and seems to be on the rise, though it’s a mystery why. Most contact lens wearers are myopes. Read the rest of this entry »
Contact lenses float on a layer of tears that covers the cornea and are held in place by surface tension. Soft lenses ride on a thinner layer of tears than hard lenses. The front and back surfaces of contact lenses serve different functions. The back surface is designed to fit the contour of the cornea itself as closely as possible to make the lens fit comfortably and, in the case of a hard lens, to provide a new, round, smooth surface. The front surface is designed to fit your prescription, which corrects your refractive error. How well your eyes are examined and measured, and how closely the contact lenses‘ size, fit, and shape come to these measurements are, therefore, very important factors in how successfully you’ll be wearing your lenses. Everything is done with highly sophisticated and accurate optical instruments, in combination with a contact lens practitioner’s experience and knowledge. Read the rest of this entry »
Contact Lenses Care .
