Eye glasses are used to correct poor vision. They modify how the eyes see to fix the effects of myopia (nearsightedness), hyperopia (farsightedness), or astigmatism.
Eye glasses can be bought over-the-counter that are used for reading by those who have mild vision problems. Eye glasses can also be prescription lenses prescribed by an optometrist or ophthalmologist.
The power of the lens in eye glasses is measured in diopters. Reading glasses are usually rated at about +1.00 to +3.00. Eye glasses that are used for correcting nearsightedness are measured in negative diopters, such as -3.00.
Multi-Focal Eye Glasses
As people age, their ability to focus decreases. For some, it becomes necessary to wear glasses that have multiple-focus lenses, such as bifocals and trifocals. Traditional multifocal lenses were originally created as separate lenses (invented by Benjamin Franklin). Modern multifocal lenses smoothly transition between the different lenses and are unnoticeable by most wearers.
There are also eye glasses created specifically for people who use computer screens all day long. These lenses are intended to be seen at a fixed distance. Many people will have several pairs of glasses for different situations and distances, including reading, computer use, television watching, and writing.
Material of Eye Glasses
Lenses were originally made from glass, but now they are usually made from various types of plastic that are more shatter-resistant and weight less. Plastic has other advantages over glass: some plastics absorb ultraviolet light better and transmit visible light better than glass. Also, scratch-resistant coatings can be applied to most plastic lenses. Anti-reflective coatings that improve night vision can be applied to most plastics as well. Polcarbonate lenses are the lightest and most shatterproof type of plastic lenses. These are the best for impact protection. CR-39 lenses are the most common plastic lenses in eye glasses because they are light, scratch-resistant, and block ultra-violet and infrared rays well.
Picking Out Eye Glasses
When buying new eye glasses, consider more than just their function and purpose. Try on glasses that suit your face type as well as suit the type of person you are. Eye glasses are easily noticeable and create an image of who you are to other people. Whether you are a fast-paced business executive, an active athlete, or a creative artist, there is a pair of frames that will suit your lifestyle.
Eye Glasses for the Conservative
If this is what type of person you are, classic, recognizable shapes such as oval, rectangle, or almond. These frames are simple and uncomplicated. Thin plastics and metals are recommended, as well as rimless styles. Colors that work well are silver, brown, and black for men, and silver, brown, gold, and burgundy for women.
Eyeglasses for the Creative
If you are a creative type, you may want to consider modern shapes or fun colors.
Thicker, larger plastics can be a good choice for you, but metal materials can also appear creative and fun. Unusual colors such as blue, red, or purple will also stand out and show the world who you are.
Eyeglasses for the Baby Boomer
If you are aging, choosing a modern look will help keep you from aging yourself unnecessarily. Choose a frame that is uplifting for the face such as soft cat-eye glasses for women or upswept rectangles for men. Brownish metals than shine can add life to a face, but it’s best to stay away from black, silver, and dark, dull colors.
Eye Glasses for the Active
If you participate in sports, you may find it necessary to have a second pair of eyeglasses just for sports. Special safety eye glasses are made just for athletes. Some have shields to protect the eyes and some are wraparounds to help them stay put. And they are usually made of very light, shatter-resistant material, perfect for impact sports.