In general, frames made from metal, titanium or alloys (a mixture of metals) stand up well to wear and tear.
- Titanium frames are very strong, lightweight and corrosion-resistant. They are hypoallergenic – an important consideration for people who are allergic to certain metals, such as nickel. "Titanium frames are sturdy and can be a good choice for older children or for anyone who is rough on their frames," says Dr. Harrison. Titanium frames come in a variety of colors.
- Monel is a mixture of metals. While these frames may have nickel or other metals that can cause allergic reactions in some people with sensitive skin, Dr. Harrison says most monel frames have a coating to protect the skin. Monel frames are quite flexible and corrosion-resistant.
- Beryllium costs less than titanium, and is very lightweight and strong. It is also flexible, making it easy for the optician to adjust them. Beryllium is extremely corrosion-resistant, Dr. Harrison says. These frames can be a good choice for people who spend a lot of time in or around salt water. Beryllium frames come in many colors.
- Stainless steel frames are lightweight and strong, but not as light as titanium. They can be less expensive than other metal frames and are corrosion-resistant.
- Flexon, as the name suggests, is a very flexible material. Flexon is an alloy of titanium, which comes back into shape even after it is twisted or bent. These frames are lightweight, corrosion-resistant and hypoallergenic. “These frames are great for active kids,” Dr. Harrison says.
- Aluminum is sometimes used in high-end frames. It is corrosion-resistant, flexible and strong.
Plastic Eyeglass Frames
Plastic frames are the most popular choice, because they usually are less expensive, are lightweight and come in a variety of colors and styles. "While plastic frames tend to be cheaper, designer brands can get pricey," Dr. Harrison says.
He recommends plastic frames for infants and small children, who are hard on frames. "For infants and small children, soft plastic frames are good," Dr. Harrison says. "Soft plastic frames are bendy and less likely to hurt the child in a fall." A disadvantage of plastic frames is that they break more easily than metal frames. "With time, the color can fade slightly, and their strength may decrease a bit," Dr. Harrison notes.
Types of plastic frames include:
- Zyl (zylonite, or cellulose acetate) is inexpensive and lightweight, and comes in many colors. Zyl frames are easy for an optician to adjust.
- Cellulose acetate propionate is a lightweight, nylon-based plastic that is hypoallergenic. It can be a little softer than other plastic frames.
- Blended nylon frames are strong and lightweight, and are a popular choice for sports or safety frames. Nylon frames are often found in wraparound styles, because they are easily molded.
- Optyl is a brand of epoxy resin. When heated, it becomes very malleable, making it easy for the optician to mold the frame to the shape of your face.
Rimless or drilled frames are lightweight. Trivex or polycarbarbonate lenses work with these types of frames.
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