Metal vs Acetate : Pros and Cons.
Eyeglasses are usually made from either metal or plastic, each material has its pros and cons.
Recently, manufacturers have make frames which combine metal and plastic to create something new.
Most if not all, metal frames come with nose pads. Nose pads split people’s opinion, some love them, some hate them.
Whatever your view they also have pros and cons.
The nose pads on a metal frame are adjustable, which allows them to fit to the correct spot for a variety of different face shapes, giving the wearer greater comfort.
The downside with metal frames, is that the weight of the frame and lenses rests on the two small pads.
This can lead to pressure spots where they contact the nose.
Metal frames are usually more robust, and can recover from damage, like being sat on.
Metal frames in general tend to be lighter, especially titanium.
Titanium frames are also hypoallergenic, which means they will not iritate the skin..
However, other types of metal frames may cause skin allergies in people who are allergic to nickel.
Acetate / Plastic frames
There are many different types of plastic which are used to create eyeglass frames.
They include acetate, TR90 injection moulded, Optyl and SPx which all have different properties.
Another important difference is the plastic frames do not have any nose pads, instead, they have what is called a ‘comfort bridge’.
A comfort bridge should fit snugly over the bridge of your nose, distributing the weight evenly over a larger surface area.
This gives much greater long term comfort.
However, plastic frames do not offer the same adjustment options as metal, but they can be tightened behind the ear for a better fit, preventing them from slipping down.
As long as the bridge is fitting well on a plastic frame, the rest of the frame should follow.
Plastic frames also have a more solid feel to them, and can have a much greater range of looks and colours, but are more likely to break if they are sat on.
Some designers have married up the two materials, plastic and acetate, into a frame which has some of the properties of both.