Most eyeglass frames today are made of plastic because it is lightweight, malleable and relatively low cost. Plastic is a relatively inexpensive raw material and therefore, plastic glasses are more affordable. You can see plastic frame glasses in different shapes and colors that are stylish and generous as well as strong and durable.
Plastic glasses are lightweight, malleable, colorful and cheap. If you must compare it with other materials, there may be shortcomings, but the above advantages are enough to show that plastic frame glasses are good.
Any ordinary glasses are generally fine for 1-2 years if used in a regular environment. Of course, if you happen to sit on your butt on your plastic frame glasses or if they are used as toys by your children, then... I highly recommend you take a look at our how to adjust your glasses.