Eyeglasses help to correct refractive errors, such as nearsightedness, farsightedness and/or astigmatism. There is a large variety of lenses available to meet the individual needs of each patient.
Single Vision Lenses
Single vision lenses have only one viewing area through the lens. They are used to correct far-distance, near-distance or reading.
The term “multi-focal lenses” refers to any glass lens or contact lens that contains more than one strength. These are especially helpful for people with presbyopia due to their ability to correct near and far vision simultaneously.
Bifocal lenses have two viewing areas through the lens, allowing for near and far vision to be corrected within one lens. The two zones are separated by a noticeable line on the lens. The upper viewing zone allows for distance viewing, while the lower zone allows for near vision tasks, including reading.
Progressive lenses, sometimes known as “no-line bifocals”, are a type of eyeglass lens that provides vision correction for multiple ranges – close objects, far objects, and intermediately ranged objects. Unlike traditional bifocals, however, progressive lenses are made so that the different strengths within the lens appear smooth and gradual, instead of the noticeable “lines” in traditional bifocal glasses. These are a terrific choice for anyone who wants the versatility of bifocal glasses without letting anyone know that they need reading glasses at all.
Most progressive lenses are fashioned so that distance correction is located towards the top of the lens, intermediate range correction is directly in the center, and nearsighted correction is at the bottom. Unlike normal bifocals, however, the transition between the different corrections is gradual, and many patients report that the gradual change is much easier and more natural than “lined” bifocals.
Types of Lenses and Lens Coatings
- Polycarbonate Lenses: thinner, impact-resistant lens (perfect for children)
- High-index Lenses: thinner lenses that provide finer optics
- Aspheric Lenses: stronger prescription in a flatter, thinner lens
- Anti-reflective: reduces reflections, providing superior optics and a more aesthetic appearance
- Polarized: reduces glare, providing clearer vision
- UV Coated: blocks UV rays from damaging the eye
- Variable Tinted: also known as transition lenses; allows the lens to turn darker when outside and lighter when inside
We offer a wide array of frames to fit the lifestyle of any person. Frames come in a variety of shapes, sizes and colors.
Contact lenses are an alternative to glasses for correcting refractive errors. A contact lens is a clear, thin disc that fits perfectly over the front of the eye, also known as the cornea. There are numerous kinds of contact lenses available to fit almost any patient’s needs.
There are four kinds of colored contact lenses: visibility tints, enhancement tints, color tints and light-filtering tints, and all of them have very unique purposes.
Visibility Tints are tints, usually of a light blue or green color, that are very light and are only for helping the contact lens to be seen during insertion and removal. They do not change the color of your iris.
Enhancement Tints are darker than visibility tints, and do change the color of your eyes. However, as their name suggests, they are designed more to enhance or further define the preexisting color of your eyes, and not to change it entirely. These are especially effective for people with light-colored eyes like gray and blue.
Color Tints are contact lenses which are mostly opaque, with the desired eye color printed on the opaque section that completely covers the iris, while the center portion of the lens is clear to allow you to see. These lenses can entirely change the appearance of your eyes, and can be obtained in a wide variety of colors and styles, from light eye colors to dark eye colors and even exotic, decorative designs like cat or alien eyes.
Light-filtering Tints are contact lenses that are designed to reduce or filter out certain colors and wavelengths of light. These are usually made for sports purposes, and can be very useful when the wearer needs to more easily identify objects of a particular color – the yellow of a tennis ball or the white of a golf ball or baseball, for example. Light-filtering contact lenses make the desired color or colors stand out by dimming the other colors of the spectrum. This makes the object easier to see and target.
Like multi-focal eyeglass lenses, multi-focal contacts contain different strengths on the same contact lens, providing the wearer improved near and far visions. These can be obtained on contact lenses in many ways. One way is by arranging the contact lens much like a bifocal, with near-vision correction on the bottom of the lens, and far-vision correction on the top. Another is by arranging the different strengths in a “concentric” pattern – where near-vision and far-vision correction strengths are placed in rings beginning from the center of the contact lens and moving outward – or in a “spherical” pattern, where the entire surface of the contact lens is a gradual progression from one strength in the center to another strength on the outer edges of the lens. Regardless of the pattern, the underlying principle is the same: the wearer’s eye receives multiple visual signals from the different strengths on the contact lens, but learns to effectively ignore any but the most useful image depending on the situation.
Care of Contact Lenses
To help maintain the healthiness of your eyes and superior vision, it is important that you carefully follow the instructions of properly caring for your contact lenses.
- Always wash your hands with soap before handling your contact lenses.
- Before inserting your contact lens into your eye, use a contact cleansing solution to cleanse thoroughly.
- Always insert contacts prior to applying any cosmetics.
- After inserting your contacts into your eyes, empty your contact case and rinse thoroughly with warm water, and allow it to air dry.
- Never wear your contacts overnight, as it may lead to an infection in the cornea which can permanently damage your vision, even to the point of blindness.