Acuvue Bifocals are designed with multiple concentric zones of power. Certain rings are for distance power, others are for near vision. The pupil reacts to light by dilating or constricting, and this results in specific zones being simultaneously...
When you suffer from presbyopia, you have difficulty focusing on objects up close. This condition typically appears after you turn 40 and is considered a natural part of the aging process of the eye, according to the American Optometric...
Presbyopia is a condition that occurs during the aging process. As a person ages, the muscle surrounding the cornea weakens, so the eyes are not able to focus as clearly. For this reason, a prescription contact lens in the form of bifocals is...
Bifocal contact lenses were developed for people with the eye condition known as presbyopia. Presbyopia typically develops after the age of 40 and involves the loss of your near vision. You will notice this condition particularly when you are...
When small details and fine print become difficult to read or when a person has to hold printing at arm's length to read, he probably needs bifocals. Presbyopia is a condition that affects people beginning around the age of 40 and is corrected by...
Toric contact lenses are usually prescribed to correct astigmatism, a common vision problem. Toric lenses have special curves to help compensate and correct for astigmatism.
Around 135 million people worldwide wear contact lenses, small corrective plastic discs that sit on the surface of the eye, MayoClinic.com reports. While contacts have many benefits, they also have many drawbacks and can cause serious...
Contact lenses are small, disc-shaped pieces of plastic that are placed on the surface of the eye. They are worn primarily to provide vision correction for several eye problems. Contact lenses are often chosen as an alternative to eyeglasses...
Almost everyone has to use optical aids like bifocals for reading by the age of 50. Presbyopia is the gradual loss of the eye's ability to adjust and focus when trying to read or see up close, according to the National Eye Institute. Luckily,...
Presbyopia is a natural aging process that affects the eyes. Most people begin to need help with reading and seeing up close by their mid-40s, according to the American Optometric Association. Progressive lenses help people see at the distance, up...
Bifocals are dual-vision glasses that allow the patient to see two different vision prescriptions through the same lens. Bifocals can often be identified because they look like a normal glasses lens with a portion of another lens resting on top,...
Contact lens prescriptions must be obtained from an eye care practitioner, either an optometrist or an ophthalmologist. Even if a patient already has a prescription for glasses, additional tests and measurements are required for proper lens fitting.
Contact lens prescriptions contain various abbreviations and numbers that can be difficult to decipher if you aren't familiar with their meanings. Your prescription will tell you exactly what is wrong with each eye and what your contact lens will...
Astigmatism, which is an irregular curve of the cornea, is so common that more people have it than don't have it. The University of Michigan's Kellogg Eye Center notes that astigmatism is not a disease, but rather a visual disturbance caused by...
Farsightedness, medically known as hyperopia, is a condition that results from a flat cornea or short eyeball length. With farsightedness, light rays enter the retina before the eye is able to focus on anything. As a result, images focus on the...
Aspheric contact lenses are a newer design concept, filling a niche for clearer, crisper vision for certain patient populations. From the early days of hard, unbreathable lenses to the highly oxygen-permeable soft contact lenses of today, aspheric...
Nearsightedness, or myopia is a common vision problem that affects about four out of every 10 people. People who are nearsighted have trouble seeing in the distance. Eyeglasses used to correct nearsightedness are either prescribed to be worn...
Bifocals are glasses with two prescriptions placed into one frame. There are several ways bifocal lenses are manufactured, depending on price and appearance. The most expensive lenses are progressive, where there is no discernible difference...
Multifocal contact lenses give people the ability to see near and far distances without the need for glasses. Although many find these contacts useful, they are not for everyone. People interested in using multifocal contact lenses should explore...
A contact lens is a thin piece composed of various plastics placed directly over your pupil to correct nearsightedness, farsightedness or astigmatism. There are many different types of contacts, including Toric (for astigmatism), bifocal (for...
Many people are inflicted with a sight disability known as astigmatism, a condition in which the cornea of the eye is curved irregularly, leading to vision reduction. One of the best solutions to this problem is to obtain special contact lenses...
Eye exams evaluate much more than your ability to distinguish a fuzzy letter 'O' from a fuzzy letter 'Q'; in many cases, they are crucial in detecting serious diseases. According to the American Optometric Association, a healthy adult should have...
Wearing multifocal contact lenses gives individuals the ability to focus through different strength prescriptions, but through the same lens. The technology uses a single lens for each eye rather than multiple lenses. One of the most common types...
Contact lenses are an option for many people who need vision correction but do not wish to wear glasses. Typically, eye care professionals will provide patients with a copy of the prescription required to purchase lenses through retail vendors,...
Approximately $8 billion was spent on eye in the United States care in 2009, according to reports from market research company IBIS World, with more than 20,000 establishments and companies offering prescription reading eyeglasses and contacts in...
